photoshop mixer brush not properly working when i press alt

[동규274869055tio]

When I use this brush, if I press Alt, the cursor changed like the image below until 10 minutes ago, but now if I press Alt, it changes to eyedropper tool. I tried resetting the tool, but it didn't work

plz help me im so sad

I've been fighting for two hours now

[kevin stohlmeyer]

The default keyboard shortcut for the eyedropper tool is to use Alt when on a brush tool.

The section on Painting Tools shows all the shortcuts while using the brush.

https://helpx.adobe.com/photoshop/using/default-keyboard-shortcuts.html