It is not for all types of updates either, but noticed for example(in a forum page which was tagged initially) after adding new topics, the tags disappeared....also some other examples
I have the same issue as other users! Could you please let us know, if you found solution.
Thank you!
Waiting for you reply
I tried to detect this problem many times on my test site, but without success. If somebody knows how to reproduce it I'll be very glad to take a look and fix it.