I’m running 11.0.4 on my Win10 22H2 build with no issues. Looks like you have an older version of Win10 though, build 1809 so it may not have been validated for use on older Win10 builds and you may need to use an older agent perhaps?
If your using the 2019 LTSB build, equivalent to build 1809, then maybe there are some issues that didn’t arise in testing.
I installed a clean build of 2019 LTSC and installed 11.0.4 agent with no errors appearing. Patched it via Bigfix with 2021 Aug SSU and the 2025 Aug CU and rebooted once all complete and Bigfix client still appears to be operating with no errors. The ntdll.dll version is 10.0.17763.7678.
I can try and remove the update and try with last months CU, if thats what your patch level is
Do you mean you are not able to reproduce the crash, if you manually shutdown the client? How are you experiencing the crash then, by rebooting the server? Is it possible the OS does not give enough time to the client to stop itself and kill it?