While moving through canvas by pressing Space key and moving the mouse, the shadows of objects and images with Gaussian Blur effect are flickering.
I tested this by loading an already existing .skecth file created with Sketch app (51.3).
We are aware of these problems, we’ll do our the best to fix them in the nearest release.
Take your time. As i said, is not a priority for me as a user. All my best!
Thank you for your cooperation! We do appreciate it!