APK Sideloading . Unable to tap on Install button

Anyone run into this issue before? When I open an APK to install, tapping the Install button does nothing. Sometimes if I tap on it a lot, and in different parts, it will go through, but other times I can't seem to get it to work. Tapping Cancel will work as expected, and when I enable Tap Views in Debug options, I can SEE the taps on the button.

Unknown Sources is checked and turning off Verify Apps makes no difference.

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