Created attachment 241829 [details]
Program to reproduce. Find version with Makefile and test-sound on https://github.com/hzeller/gstreamer-gapless-test

Using the 'about-to-finish' callback to set the next URI to play to get gapless playback (as documented) works fine with file-URIs, but fails with a network resource such as a HTTP-URI.

Instead of playing the resource set by the about-to-finish event, it quickly re-emits the event without even having started to play the new resource -- looping forever, racing to the next resource.

Attached, you find a simple program to reproduce the problem. For easier reproduction, a version including Makefile and test-sound can be found on https://github.com/hzeller/gstreamer-gapless-test