After the lock screen wakes up, the password cannot be entered

[Liang-zy]

Version: 20.04 LTS
Test environment: ThinkPad X1 Dell 7060
Prerequisite: The screen is locked
Test steps:
Step 1. Wake up from the lock screen, enter the password to log in to the system
Expected results:
Step 1. The lock screen wakes up normally, enter the password to enter the system
actual results:
Step 1. Wake up normally. After entering the password, it is found that the password cannot be entered, the mouse will move normally, and then click "Normal". When you click the password input box, the input box has no response and no cursor. When the uppercase and lowercase keys on the keyboard, the num key prompts normal, and other functions are normal.