I’m having a problem where pressing the Delete (aka Backspace) key on a Mac deletes a group of characters. Generally, characters will be deleted until certain characters are encountered (e.g., a sigma which may require a substitution) or until the user presses a key.
All Macs are using sil_greek_polytonic keyboard with macOS 12 (12.5.1 and 12.6) and Keyman 15 (15.0.270 and older 15.0, which I updated to the latest before even reporting this). Some of them are M1 and some older Intel.
The problem only happens in certain applications, specifically Firefox (104 and 105) and some Chromium based browsers (Google’s Chrome and Respondus LockDown browser). I do NOT have this problem with Safari, Notepad, Apple Pages, Microsoft Outlook or Word or Edge (which is Chromium based), etc. but it does regularly happen on Firefox and Chrome. Nor do I see this problem on Windows versions of Firefox or Chrome.
Unfortunately, I must use Respondus LockDown browser for testing.