The 8.0.7 nightly build from today contains a change that is relevant to the overlay issue presented here earlier. In short, null values on initial load were categorized as bad quality instead of uncertain quality, which is why the red overlays were appearing. There will still be overlays while bindings are loading, but they should use the grey overlay.
@zxcslo this change doesn’t really impact your case, since the error your seeing in the GIF is showing an unsupported operand exception due to performing arithmetic operations in a script on a null (NoneType) value. In that case, you’ll need the script to account for a null value while loading the bound value, otherwise the error will continue to occur.