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IT technician here, I have a decade worth of experience dealing with computers and users, using Windows XP, 7, 10 and 11.
I have remoted into user computer on every continent except south America and Antarctica. I have used keyboard layouts from UK, US, DE, DK, NO, FI, FR, ES, NL, SE, TR, JP and probably one or two I have forgotten.
The only time I have seen the behavior described here was when using a third party patching system that fails to unlock bitlocker.