bad video mode on legion go onboard display after disconnecting from a 4k monitor

I'm using Bazzite on a Legion Go and any time I disconnect my 4k LG monitor I get a scrambled display on the LLG, as if the video mode is set wrong for the finicky display. It works fine for 1080p displays, and I can restore functionality by plugging a 1080p display in or I can reconnect and quickly disconnect my 4k monitor (before any video modes are set) and it'll restore the display.

Any idea on what might be going on here?
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