I'm running Photoshop 2020 on a 2011 iMac with the highest OS of High Sierra 10.13.6. I use the lasso tool quite a bit but every time it screws up and cuts spaces out of my screen in really weird ways. The screen returns to normal when i switch tools and is able to perform the function but there is now this weird thing and an extra step. How do I stop this from happening? Do I need to just reinstall an older version of Photoshop?
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