Resume produces left-shifted inoperative unlock dialog, how to get back in?

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If I shut my laptop's display and unplug too quickly, I sometimes find that when I re-open the display that the Mate screensaver unlock dialog and background have shifted to the left of the display instead of being centered, the unlock dialog, although visible, is inoperative, and the right side of the display has a block of background image.
The mouse pointer still moves and even changes state.
I can press ctrl-alt-F1 to enter a console and login. A "ps aux" shows that all processes are still running, including Firefox, Thunderbird, etc.
I have tried issuing some mate-screensaver-command with various options but this had no effect.
Can someone help by suggesting some console commands that may help revive X into a usable state and return to my work?

In greater detail before I file a bug report (I need to better understand how to reproduce this bug):
This happens when my laptop is receiving power via USB-C from an external display (which I usually don't use as a secondary display -- so the external display is in sleep mode). I'm on Ubuntu Mate 24.04.1 LTS. Laptop is a Thinkpad X1 gen 9 with resolution 3840x2400 (such a high resolution is sometimes not handled smoothly by X when an external display with a much lower resolution is connected). I have not experienced this issue when unplugging from a conventional power supply.

Thank you,

Thomas

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Welcome, @thomas2net to the community!

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It looks like this is a mate-screensaver bug related to the now closed:

I guess we'll soon have the pleasure of re-opening them...