Erasing auto-filled passwords

When logging into my NextDNS account on my iPad (using Firefox for iOS), the browser auto-populates my username and password, as expected and desired. When I click on “Log in”, NextDNS erases both values and tells me to enter my username and password. To get around this, I have to let it auto-fill, put a space after my email and erase it, and do the same for the password. That is silly. Please change your validation to look for a value, not a keydown or onchange event.