NextCloud Talk Video Issues On iOS

I have an issue with NextCloud Talk video on iOS. If I initiate a video call on an iOS device and join the call from a pc/mac via the web browser it all works as expected. However, if I start a call on a web browser and join from the iOS app it starts the audio just fine, but when I switch the iOS device to video the call hangs and just says “waiting for…” and never connects. In summary, there is only the option to answer a call on iOS in audio mode… which works until trying to activate video. Any suggestions?