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No.

But in theroy it should not make a difference.
hreflang can be either implemented in sitemap or in page.

Thanks for checking. Yes, rich snippets are frequently not showing currently, however this is a different issue and it may be temporary.

My primary concern is rather that google does not index our sitemap for this domain according to search console and related that they show the .com page as cached version of the .uk page.

Happens already for many months.

Good idea to test with VPN. I just gave it a try with a UK proxy  and same result.

Sure, click on cached version of the first result in the following google search. Also you see here the rich snippets in USD instead of GBP:

https://www.google.es/search?q=site%3Ahumidordiscount.co.uk&oq=site%3Ahumidordiscount.co.uk&aqs=chrome..69i57j69i58.6216j0j1&sourceid=chrome&es_sm=93&ie=UTF-8#q=site:humidordiscount.co.uk+firenze

everything looks fine  in google search console.

no hreflang errors, no sitemap errors and google crawls every day basically all our pages for many months already.

Webmaster tools indicates that only 25% of pages on our UK domain with GBP prices is indexed.
We have another US domain with identical content but USD prices which is indexed fine.

When I search in google for site:mydomain I see that most of my pages seem to appear, but then in the rich snippets google shows USD prices instead of the GBP prices which we publish on this page (USD price is not published on the page and I tested with an US proxy and US price is nowhere in the source code).

Then I clicked on the result in google to see cached version of page and google shows me as cached version of the UK product page the US product page.

I use the following hreflang code: rel="alternate" hreflang="en-US" href="https://www.domain.com/product" />
rel="alternate" hreflang="en-GB" href="https://www.domain.co.uk/product" />

canonical of UK page is correctly referring to UK page.

Any ideas? Do I need to remove the hreflang for en-US to get the UK domain properly indexed in google?

Hi Joe, thanks. I had the same thoughts and already talked to them. It is only offered to enterprise clients of cloudflare and requires an ICP number which in turn requires a company located in China.

Everett, thanks a lot. 
Finally there was an update of the module we used for generating the code that resolved the problem. Cant say what they changed.

thanks a lot. Makes sense.

Just in our case a bit difficult to implement since all our language versions are based on same template and it would not be worth the effort to make a complete new design/CSS/javascript for the Chinese web version. Site is already mobile optimized.

Anybody has experience with fast and affordable caching services from HongKong?

I made some speed tests and noticed that our website loads 10 times slower for visitors from China mainland.
Did anybody have experience with speeding up loading time for visitors from China?

We operate the Chinese version of our website in a subdirectory and we have no interest in registering a company in China in order to get the ICP number.
Currently using cloudflare who should have a node in HK and serving static content via rackspace.

Does disabling google analytics and facebook widgets really make a difference? (ideally would like to avoid this)

Thanks Cyrus.

Thanks Tom.
I will move now one of my main domains and will use their PRO plan. Noticed they have quite a number of settings to address the false positives. Our problem with cloudflare error pages may have been a temporary one while they where building the cache of the site. Anyway it is easy to enable/disable the cloudflare protection. So not much risk here. Could save us of a lot of potential headache in the future if it works as advertised.

google updated the page. 
Unfortunately it did not have the desired effect.
Rating snippets now disappeared completely. 
Price and stock are still showing in the snippet.

Thanks.

I have unmarked the individual reviews according to your suggestion and I am waiting now for google to update the page.

I am considering using cloudflare for a couple of my sites.
What is your experience?

I researched a bit and there are 3 issues I am concerned about:

1. google may consider site bad neighbourhood in case other sites on same DNS/IP are spammy.
   Any way to prevent this? Anybody had a problem?

2. ddos attack on site on same DNS could affect our sites stability.

3. blocking false positives. Legitimate users may be forced to answer captchas etc. to be able to see the page. 1-2% of legit visitor were reported by other moz member to be identified as false positive. 
   Can I effectively prevent this by reducing cloudflare basic security level?

Also did you experience that cloudflare really helped with uptime of site? In our case whenever our server was down for seconds also cloudflare showed error page and sometimes cloudflare showed error page that they could not connect even when our server response time was just slow but pages on other domains were still loading fine.

the product pages of my ecommerce site contain schema markup. 
according to rich snippet tool from google all looks fine and properly formatted
however in the SERP google shows the last rating in the snippet instead of the aggregate rating.

any idea how to show the aggregate ratings?

URL: https://www.humidordiscount.co.uk/adorini-triest-deluxe-rosewood-humidor

below extract of schema code as recognized by the rich snippet tool:

• Product

• name:adorini Triest Deluxe Rosewood Humidor

• image:https://www.humidordiscount.co.uk/952-large_atch/adorini-triest-deluxe-rosewood-humidor.jpg

• description:High-quality multiple .....

• brand [Organization]:

• name:Adorini

• offers [Offer]:

• price:141

• priceCurrency:GBP

• availability:http://schema.org/InStock

• aggregateRating [AggregateRating]:

• worstRating:1

• ratingValue:4.5

• bestRating:5

• ratingCount:460

• review [Review]:

• description:It 's my first ....

• reviewRating [Rating]:

• ratingValue:4

• worstRating:1

• bestRating:5

• author [Thing]:

• name:Alessandro M

• review [Review]:

• description:excellent ...

• reviewRating [Rating]:

• ratingValue:5

• worstRating:1

• bestRating:5

thanks everybody.
excellent advice. I will just limit to make some tests of  products for now to see how it will affect ranking.

Gianluca. that is excellent news. Just curious since this is quite an important issue for us.

Do you speak from own experience with a similar case?
I did not find anywhere other references that contextual links should be fine. Do you remember anybody who wrote about it in the past?

Just noticed that tripadvisor actually removed now all their contextual links to alternative language versions that they used to have in their footer. Instead they now implemented a flag drodpown where contextual links are not showing up anymore in the sourcecode.

Gianluca, thanks.
The footer links are currently contextual deep links. 
Since I am interlinking here 16 TLD, I was just concerned that google may penalize this and that I better hide the links from google.

I remember that Matt Cutts recommended against interlinking many language versions of a site.
Considering that google now also crawls javascript links, what is best way to implement interlinking?

I still see otherwhise extremely well optimized large sites interlinking to more than 10 different language versions e.g. zalando.de, but also booking.com (even though here on same domain).

Currently we have an expandable css dropdown in the footer interlinking 16 different language versions with different TLD. Would you be concerned?

What would you suggest how to interlink domains (for user link would be useful)?