When using mixer or maybe paintbrush tool, holding down "i" will temporarily switch to eyedropper tool until let go of it, which then returns to tool you were using before. Same behavior with ALT, but for now this is focusing on the "i" keystroke for eyedropper
so if using maybe paintbrush, press 'Capslock' one time and brush cursor changes to a crosshair.
Next, hold down "i" to temporarily switch to eyedropper tool, then release it.
Photoshop does not retun to previous tool upon release of "i".
This bug happens only when "capslock"has been pressed to show crosshair cursor.