SPA (angularJS) Ranking Problem

[cafegardesh]

Hello dear experts;

I working on SPA website with More than 20,000 indexed pages by Google

there is a problem that I involved with:

1- Some pages had a good ranking on google.com but from a week ago, ranks one by one, dropped and homepage Replaced.

for example, URL: https://cafegardesh.com/tours-dubai removes and https://cafegardesh.com replaced.

Google still see the page when I use Fetch as Google tool. I can't understand what happens

Is there anyone can find my site problems?

[cafegardesh]

any answers!!?