Screen mirroring

I've purchased courses in the past and I think I was able to screen mirror the modules from my phone to my TV, but recently purchased more courses and it doesn't seem to give me the screen mirror option anymore while watching the modules. Did something change or am I missing something?

To my knowledge nothing has changed i will leave this question open incase someone can add advice that maybe helpful

Regards Ross

Just tried it on my phone and theres no mirroring option either, are you on Android?

Yes I am using android. It weird because I'm sure I was able to cast it in the past, and I can still cast other videos with no issues.