Hi oleg kaz,
Thanks for the detailed troubleshooting. Since you're currently running Windows 11 Insider Dev build 26300.9032, the next step would be to determine whether this is a Dev-build regression or a broader Windows/network-driver issue.
Could you please test the same scenario on a stable Windows build (GA/Release version of Windows 11) if available?
If the issue does not reproduce on a stable build, that would strongly suggest the problem is specific to the current Dev Insider build. In that case, please submit the issue through Feedback Hub and include the troubleshooting results, Windows build number, and Mobile Hotspot behavior to help the Windows engineering team investigate the regression.
If the same behavior occurs on a stable build, please let us know so we can continue narrowing down whether the issue is related to the wireless adapter, driver, or another networking component.