I've watched a few backlinks disappear from our inbound link search.

[Deacyde]

After inquiring to Moz.org about this, they suggested this might be due to a new feature that was rolled out, however, this 2 year old backlink still hasn't shown up and I'm a little concerned. Has anyone else experienced this?

[MattRoney]

Hi there! It's very possible that this is due to our last couple of indexes being smaller than previously, which is an issue that we're hoping to resolve with our next release. You can read more about what happened here:

https://moz.com/community/q/september-s-mozscape-update-broke-we-re-building-a-new-index