It doesn't happen when you first start using Krita, but seems to happen more frequently as you change brush presets. I attached a video of the simplest steps to reproduce this. https://youtu.be/ETipJ0_JXrM It doesn't seem that bad, but i was doing a painting last night and quite a few times I had big smears happen across my entire canvas and artwork as I was changing brushes and trying to continue. Reproducible: Always Steps to Reproduce: 1. See Youtube video in description 2. 3.
skip ahead to 40 seconds of the video to see the problem begin to happen. It doesn't always happen, but seems to happen more as time goes on.
Yes, it seems like the number of brush connections grows with the time :( And the brush jumping happens do to Qt handling a long delay somehow. Qt 5.6.something doesn't have this issue.
Git commit 430b17968e79df3fee35cf3091e48c01cbd02dc3 by Dmitry Kazakov. Committed on 16/08/2016 at 10:43. Pushed by dkazakov into branch 'master'. Fix leaking connections in KisPaintOpBox Fixes T3462 M +6 -8 libs/ui/kis_paintop_box.cc http://commits.kde.org/krita/430b17968e79df3fee35cf3091e48c01cbd02dc3