What is the most stable catia 3dexperience version.

What is the most stable catia 3dexperience version.
Hi. We are using Catia 3Dexperience R2019x Hotfix 8 (build level 6.421.9.0). We have a lot issue with this release. For example measurement bugs, program crushes etc. Is there anybody that who lives that kind of problems? And what is your suggestion?