Error when updating system extension

I'm currently observing a problem similar to this thread https://developer.apple.com/forums/thread/737334

The difference is that this is happening after updating a system extension.

Basically same error, sysextd complains it can not check that the system extension is notarized: macOS Error 3 + Error code=-67050.

I think macOS (Sequoia 15.3.2 or 15.7.2 if it matters) is wrong in this case for the following reasons:

• when using spctl assess -t install, the system extension is reported to be correctly notarized.
• when restarting the Mac, the updated system extension is correctly checked and staged.
• if I run spctl assess before sysextd tries to check the system extension, it works.

I'm currently thinking of 2 reasons why the check does not work:

• sysextd is somehow trying to work with a cached assessment that has become invalid after the system extension was updated.
• macOS needs way more time between the update of the files and the request to update the staged extension. I tried adding a 5-second delay. This does not seem to work or at least reliably.

I tried just touching the system extension, no positive result. Unfortunately, in macOS Sequoia, it is not possible anymore to reset-default using spctl and see if it solves the issue, at least the next time the update is performed.

[Q] Is there some magic operation that would help macOS correctly check the notarization of an updated system extension?