Severe performance issues in PhpStorm 2019.2 and 2019.3

OS Ubuntu 18.04, PhpStorm installed via snap package. 16 gb of RAM, so it isn't a bottleneck for sure. 

After upgrading to 2019.2 I had to immediately revert back to 2019.1.3 due to severe performance problems. In particular, there is a significant time lag between pushing of any button (either keyboard or mouse) to the IDE reaction. It's much like working via SSH with very high ping to a server. Yesterday I tried 2019.3 with hope that the issue has been solved, but the same problems are still there. So again I had to revert to 2019.1 which works absolutely smoothly. 

I am ready to provide more details, logs, etc, just tell me how to gather such information which will be helpful for you to solve the problem. 

Regards