Recording stopps when overdub activated

Hey folks,
When I record a second track, recording stops after 0.1 seconds or so. This happens only if overdub or software-play-threw is activated.
If I switch my output to HDMI out it works, but then i cant her anything, because i dont have a HDMI audio device. Why is this happening? And is there a way to keep input and output at default and still using the overdub function?

On Linux, Software Playthrough should normally be off (not selected) and Overdub should normally be on (selected).

What are you trying to do, and what equipment are you using?

Try to record a second track while listening to the first one.
I use the build in microphone and headphones for output

What settings do you have in the device toolbar?