I have not had a single crash on linux, but I did compile it myself. If you did compile it, did you do the release or just clone the repo? it says in the readme that the repo tends to be very unstable and you should always build from the latest release.

... source available? I was not even aware of that. I only used the prebuilt binaries on Windows (as was recommended). I am checking out the source as we speak!

On linux it's very stable, on windows slightly less, but only in edge cases when stacking a big number of effects. Haven't used it on mac though, I think it either was or still is in beta on that platform. I was also unhappy about instability in the beginning, but it magically became better after regularly using it.