Most of the time, if I'm switching between mouse and stylus for input, the first click won't be registered, with either input device. I'm not sure it happens all the time, but it's frequent enough that I have to click again for Krita to register the action. For example, if I click on a brush with the stylus and draw a stroke, then switch to the mouse and attempt to paint on the canvas, the first stroke won't do anything. It happens with other tools too.
Git commit b52a6af243700fc61fe8098bc59b54091b4922ce by Dmitry Kazakov. Committed on 02/02/2014 at 15:06. Pushed by dkazakov into branch 'master'. Fix the ignored mouse events after using the tablet Now each Mouse Event corresponds exactly to one Tablet Event. M +6 -19 krita/ui/input/kis_input_manager.cpp http://commits.kde.org/calligra/b52a6af243700fc61fe8098bc59b54091b4922ce
Git commit 2f3c3605c996fd895b00b0fcd541992ea06ea927 by Dmitry Kazakov. Committed on 02/02/2014 at 15:06. Pushed by dkazakov into branch 'calligra/2.8'. Fix the ignored mouse events after using the tablet Now each Mouse Event corresponds exactly to one Tablet Event. M +6 -19 krita/ui/input/kis_input_manager.cpp http://commits.kde.org/calligra/2f3c3605c996fd895b00b0fcd541992ea06ea927