MacBook Pro macOS Big Sur crashing in sleep mode

My Mac Book Pro (Big Sur 11.6.4) is crashing when I try to wake it from sleep. This happened today for the first time, twice in a row. The computer was on power and connected to a thunderblot display and an iphone SE.

I get the following error report:

panic(cpu 0 caller 0xffffff801d86041a): Sleep transition timed out after 180 seconds while calling power state change callbacks. Suspected bundle: com.apple.driver.AppleIntelICLLPGraphicsFramebuffer. Thread 0x30d8.

Backtracing specified thread

...

What can I do?

Thanks!

Modellname: MacBook Pro

Modell-Identifizierung: MacBookPro16,2

Prozessortyp: Quad-Core Intel Core i7

Prozessorgeschwindigkeit: 2,3 GHz

Anzahl der Prozessoren: 1

Gesamtanzahl der Kerne: 4

L2-Cache (pro Kern): 512 KB

L3-Cache: 8 MB

Hyper-Threading Technologie: Aktiviert

Speicher: 32 GB

Systemfirmwareversion: 1715.81.2.0.0 (iBridge: 19.16.10744.0.0,0)

Seriennummer (System): ******

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