Strange bug with Impasto effect

Using large A2 canvas at 300 dpi with multiple layers. Add a layer with texture & use black to alpha, then make that a masking layer & hide.

Painting on other layers (with influence selected) works perfectly for a while - acrylic impasto builds up to reflect the texture/alpha that was added, then suddenly "breaks". The first image below is with all layers OFF - the impasto still shows (should be a plain blue image). Toggling a layer on and off - the impasto keeps getting stronger at each toggle! Sliding the impasto value up and down restores the screen, but now any further painting has this broken impasto effect - like the second image. Here a thin yellow line has corrupted the impasto layer and any further painting is hard to see because it is rendering square impasto. Again you can toggle the impasto slider to correct the image - but any painting is near impossible because of the impasto "exageration". This happens even with all influence switched off, even with everything flattened to one layer. Even closing the file & the program and re-opening everything - the file is now bust - the impasto keeps breaking on every paint stroke.

It can work perfectly for ages, but once it "breaks" the file can't be recovered from what i can see - you have to restore a previous iterative save & lose work. Hope this can be fixed :-)

FYI this is what the image should have looked like after that yellow paint:

Hi @basementPete,

thank you for your feedback!
We were able to reproduce this issue and will be fixing it to the future updates.

Awesome. Thanks for replying so quickly - look forward to the fix. Keep up the great work - this is an awesome paint package :-)

Good news - looking forward to the fix!