Did you upgrade other Epi packages at the same time?
Do you have an environment up with the older package and index so that you can compare the indexed pages in question?
We upgraded Epi-packages not related to Find before this, and they are running in production since a few weeks without any problems. So it's just the Find upgrade that makes the results to differ.
At the moment we had to revert to 12.7.1 on all environments since we have a release coming up very soon. After that I will upgrade my local environment again and check the indexes. What kind of changes do you think I should be looking for?
Have you re-build indexes for your site after upgrade? Which is a necessary step to be completed after upgrade.
Yes, they are re-indexed.
I just now upgraded to Find 13.2.5 from 12.7.1.
Before upgrading if a query was present on a page in the fallback language it would show up in the search results, but after upgrading I only get hits in the current language. I read about language routing, is this a side effect from that? And is this the intended way it's supposed to work? I need to search both current language and fallback.