Interesting. I wasn't aware there were file types one could not send via bluetooth. But you are right: shell scripts are not accepted for me either. Not that I use BT file transfer much (ssh rules!), but I might still include this in my next ROM, too. Thanks for sharing.
Time for a new build. My old mirror raid needed some action.
This time, I included some patches that @claude0001 backported to LOS16. I also made the touch screen margin control more granular, so you might want to check if the settings are to your liking. And, this build got rid of the Bluetooth file transfer MIME type restriction.
I don't think it develops. It's always been there but you don't usually notice it at first. Both my Pro1s have that to various extent in some corners. Just a common defect on those screens it seems.