I'm sorry for answering so late, but due to my work, only now i'm havin time to checkout this.
These are the configs i'm using most of the time.
The crash occurred in both situations: alone or with other users connected.
I tested with different settings on Recording options tab and under a different Jack sample rate configs (the same of other users) and still crashing, but today i found a solution for me with vst plugin that works fine but the problem still persists on the standalone app. That was curious, because the version os official repositories and Snap wasn't installing the plugins, but when i builded from git, 4 different vsts was installed! Only one of that works fine, wich is tagged "favorite". The first don't open correctly. The others are with the same crash that standalone app.
I hope this information is useful for the community.
Thanks