Piskel Sprite Editor Goes Black

Bug description
When I press ctrl+z twice, the Piskel Editor screen goes completely black, then I have to exit out of Piskel and then go back in with my progress drawing / editing sprite(s) is restarted.

The Screenshot:

Piskel isn’t maintained anymore.
The Gdevelop team is planning to switch to another pixel art editor.

I use Pixelorama for pixel art. It is stable and capable.