Bug: Pixel persona stops working on a project.(iPad Pro) Maddening

[Jan Peek]

A project I am working on for no a parent reason can no longer be edited in the pixel persona. Vector layers are fine. A saved earlier version of the same project is OK. But when I try to erase or paint on an existing (or new) pixel layer NOTHING HAPPENS. I’ve tried all the obvious checks: I’m using a simple round brush, 50 pixels wide, opacity, flow and hardness set to 100% in pixel persona/layer  pure white on transparent background. Protect alpha is turned off. I tried backing up through History as far as I could to no effect. 
I tried restarting the app. Existing pixel layers can be turned on and off but  cant be painted or erased. As I said, an earlier iteration of the same project is AOK.

I have seen this kind of behavior before, but it fixed itself after a while So what are my options? I am unable to put finishing touches on a project that I put 20 hours into. VERY frustrating.

[Jan Peek]

The attached file is a piece of the one I’m talking about.

test_mg.afdesign

[DM1]

4 hours ago, Jan Peek said:

for no a parent reason can no longer be edited in the pixel persona.

You have a tiny selection active that is stopping pixel persona from painting😀

Long press on screen and tap Deselect from pop up menu.

[Jan Peek]

Never mind. The problem after long hours of debug was a single pixel unintentionally selected, making it appear that no tools worked in pixel persona. Obvious after the fact.

[Jan Peek]

Thanks for the help.

[DM1]

9 hours ago, Jan Peek said:

The problem after long hours of debug was a single pixel unintentionally selected

Yes, I’ve done that before too. Annoying though.