whenever i go on the forums on specific devices, it always pops up with "Invalid login or password", when i haven't even had the chance to press anything
i managed to replicate the bug on my android phone (using chrome browser) and on my kindle fire (using silk browser).
on the 2nd picture you can clearly see that i haven't even entered my login information (as the login menu would be visible), so it isn't a case of me forgetting/typing the wrong password

I have this happen all the time too, even when I don't press anything.

It happens a lot to me ( on my phone)
That usually because either my wifi changed or possibly something happened