Editing the Mask Option and my colors invert to negative colors- plz help.

Hello

I’ve been struggling for months to troubleshoot this issue with lightroom. When I go to use the mask option (the option where you can choose radiant gradient, liner gradient- you can also filter the sky or the person as the main object to edit) Well any time i do this- it distorts my photos to what i assume as negative colors ( green, white, blacks) never really enhancing the subject I want to focus on. 

I’ve tried uninstalling and reinstalling without success.

Is there anyone out there that has experienced this? It’s incredibly frustrating, so I’m hoping it’s a simple fix. 

I’ve tried running my issues through chatgpt- tried that troubleshooting to no avail. 

thank you