Debug in Rider studio. Step into not working
This seems to be a bug in Rider [JetBrains Youtrack issue]. I suggest that everyone who's affected votes for this issue to increase the urgency.
A partial solution seems to be: disable "Always do smart step into".
I have an answer from JetBrains.
Need to uncheck external debbuging
may I ask you to uncheck Enable external source debug setting (Preferences | Build, Execution, Deployment | Debugger)? Does it help you?
Finally it works