Gstreamer playbin3 fails with a possible segvault as soon as I´m trying to switch to a html uri

I am currently developing a scheduling system for a small tv station using python and gstreamer. I am currently using the gapless play feature of playbin3 to switch from one playlist item to the next. But as soon as i try to switch to a html uri (e.g. web+ my script fails without any error and (strangely) exit code 0.
Any idea why this happens?