I have heard several people over the past few weeks referring to people they know who had trouble with masks in darktable 3.0 (opacities, inconsistent states, and such).
We plan to publish a version 3.0.1 as a first bugfix version in 2 to 4 weeks from now, we really need a consistent way to reproduce those bugs to understand and fix them. Words overheard through the bush don’t get bugs fixed.
Please share this to your friends and get them to report those bugs.
For non-English speakers, I can interact with people in German (in fact I’m willing to practice German again, half the darktable team is from Germany and we only ever speak English) and in French as well, so don’t let language issues prevent you from reporting. Post in whatever language you are comfortable, we will find people to translate.