The cursor gets stuck when adjusting brush masks in Camera RAW filter

Same issue when you use ACR but not as a filter? 

Try a reset of the Camera Raw preferences:
Hold down the Command key and select Photoshop > Preferences > Camera Raw (macOS) or hold down the Ctrl key and select Edit > Preferences > Camera Raw (Windows).
Click Yes in the dialog that asks "Delete the Camera Raw Preferences?"
See also:
https://helpx.adobe.com/camera-raw/using/camera-raw-settings.html