Universal Autofill doesn't fill into the Ivanti app on the Mac

Unsure whether this could help, but I have been (and still am) facing the exact same issues. I've noticed that the issue might be related to the type of "window" the login popup uses. Indeed, the window does not even have context menus or anything, meaning that you can't fill out with Keychain Passwords either. I'd wager this is why 1Password cannot fill them out, as it doesn't even seem to "detect" the window. In particular, 1Password seems to detect whatever browser tab or app is currently open in the background, as if that popup did not exist. I hope this is still something within 1Password's power to fix...

EDIT: as a workaround, I've noticed that if you use the autofill shortcut and click yes on the prompt telling you it hasn't filled out in that app/website before, the password selection list won't show up. I suggest not choosing "fill out automatically" but manually copy/pasting the username, password and OTP