You are not logged in.
This doesn't happen always, but sometimes after my pc wakes up from sleep it will not let me log in back on the lock screen panel with my password entered.
The input is normal and works but the log in button/pressing enter is unresponsive. There is no any "wrong password" errors or such.
I always have to work around it by pressing switch user and it takes me to the sddm login which works perfectly, or by tty unlocking sessions then switching back.
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