As far as I know, the bugs are not publicly visible. The best way to get Apple’s attention is to submit your own bug. You can reference my bug’s number: FB11900644.
Ok now I realize the bug isn’t limited to AppleScript droplets - it affects regular Cocoa apps, too.
(Although I’m pretty sure there was no issues with regular non-AppleScript droplets when I posted this bug - but all I know that now after a restart the bug affects all droplets).
(For example, if you drop multiple items that include a mix of regular files and apps, the application:openFiles: will be called but apps will be excluded from the array of dropped items. If a single app is dropped, the method won’t be called at all.)
I assume that AppleScript droplets don’t accept dropped apps just as a consequence of this bug in general.
The bug actually doesn’t happen when dropping on a droplet’s icon in the Dock.
The bug only happens when dropping on a droplet in the Finder (whether in Finder window or Finder toolbar). Which to me is the most common scenario of using a droplet.
Just in case anyone was in doubt: this bug is NOT fixed on Sonoma.
Back when Sonoma beta was released, I re-submitted this bug again to Apple and they yet again asked me for a sample app. And I guess yet again they didn’t find this bug important enough to fix.