white square erases drawing when using mainly eraser tool

[guilhermes75028199]

White square erases my drawing in a specific place every time. It happens frequently, 90% of the time (or maybe 100%) when using eraser tool in varied stroke number (doesn't happen every time at the same stroke). Eventually this bug goes away, but it always happens in freshly started documents.

[guilhermes75028199]

Also, sometimes, and this is more recent, hystory stucks when a few ctrl+z's and take sometime to accomplish the command. My PC has got a high energy consumption lately, indicated in the task manager, it didn't use to happen before.

[Semaphoric]

Is it different than what the eraser looks like set to block?

[guilhermes75028199]

it's just like a block of erase that appears, always above the area I'm actually erasing.

[guilhermes75028199]

It's like a rectangle, looks same size everytime.

[josephlavine]

Can you post a screen capture of your desktop showing the toolbar? Sometimes, seeing what is happening can help people determine and offer suggestions.

thanks

[guilhermes75028199]

[guilhermes75028199]

Anyone??

[guilhermes75028199]

I've just noticed that is I leave photoshop window and comeback the history unstuck immediatly.