I’m getting regular crashes when using the brush node in the latest version. These do not happen in the 2021.10.3 Beta.
It happens when selecting the brush node in the node editor.
You can download a repro with a crashdump here: Transfer - Dropbox (352 Kb, this link expires on the 30th of November)
Hi Willem,
Thanks for your feedback. We already get fixed this bug, and it will be in the hotfix patch 2021.11.2 as soon as possible.
Great news, thanks!
Do you know if there is a workaround in the mean time as this currently is stopping our production?
If anybody else is struggling with this:
If you make sure the active tool in the brush is set to Clone BEFORE the inputs to the brush are computed / connected, this crash is avoided.
I’m not sure if it has to be Clone, I just know it should not be Relax (the first one) or it crashes once the inputs become active. Clone worked and I had no desire to test the others 
Hi, Willem!
New version 2021.11.2 is already available for download on the main site. Thanks again for your feedback!