Hi!
I've just installed developer beta and realize that some files in Finder now are showing as Exec icons, regardless they are functioning properly.
Via Terminal I found there are some permissions change as was installed. I see a lot of documents have 777 level of permission.
For example I have a work One Drive folder and if I access the same file from a Windows machine there is no problem and is not identified as an exec file.
I had the same folder on Catalina and not a single file was showing as an Exec file.
Have you found similar behavior?