Hi,
If you are using or going to use Aurena across all your functional areas Update 6 would be a must since it has RTM release of Aurena client. Apart of all new bits and pieces it has a lot of improvements to Aurena framework as well as support for Oracle 19c (with small limitations listed on Certification Page: Thumbnail generation is not supported by Oracle 19c and Oracle 19C App10: Archived images are not loaded properly when archived in HTTPS Azure storage).
We have currently merged Update 6 to 7 customers in the UK one of which is currently Live on Update 5. In terms of problems I have not heard about anything specific relating to stability.
If you could find more details about stability problems I could find out more about them.
Thanks Pawel
We are on Upd3 and wait until Upd7 will be released and the info I have got from IFS is that it should be released in December.