I confirm also this bug Clicking on the Daub W&W Bristles causes Affinity Designer V2 to Crash instantly!
@SrPx What do you mean by third party content ( that causes the issue )...
Well, basically unchecking --> Show As list prevents the problem so far, but I hope this would be fixed later and we can show the bristles category as a list --> I know some bugs here and there are not that bad ( but the problem is that I spent like 1 Hour trying to figure out what is going on and I felt like there is something wrong with my PC at first )...
And @paolo.limoncelli I really like and use your brushes often thank you dude...