[IOS] - glimagesink with rtspsrc : after Ready state, video is frozen

Submitted by Alann

Description

From an IOS project, every time I play a video using rtspsrc to a glimagesink the image freezes when going back for the second time to GST_STATE_PLAYING.

I've created a demo project avaliable here : https://gitlab.com/Devoluti0n/gstreamer-ios-testing

How to reproduce :

Wait for the video to start (autoplay)
Switch to Ready state.
Press play again, the image will be frozen but the sound will work correctly.

I'm unable to understand how to correct this.

Thank you,
Alann.

Version: 1.13.x