Can't view screen mirroring in full screen on my TV since lollipop update. How to fix this?

[Major WORLD]

I can no longer view screen mirroring in full screen on my TV since lollipop update. How to fix this?

I was able to watch movies and mirror my s5 to full screen on my samsung smart tv. Now it shows the screen when in landscape, smaller since I've done the lollipop update.