Yes that is a known behaviour:
following the link you will get the info where the log output is written to:
I read a lot of information in the manual to turn on some debug settings, but I cannot see any debug information. Where can I find those debug logs?
The Windows version of dt by default logs its debug information to the following places:
Windows 10:
C:\Users\[username]\AppData\Local\Microsoft\Windows\INetCache\darktable\darktable-log.txt