Emby for Android 3.5.37 on Fire TV 4K horizontal scrolling issue

[nicko84 77]

On Emby for Android 3.5.37 with Fire TV 4K (first gen) Fire OS 6.7.7.1 
the horizontal scrolling doesn't work anymore :

I mean, i can scroll to the right but display doesn't move to the left in the same time,
so focus disapears to the rignt of the screen...

Home screen of TV mode is set on horizontal.

PS : If i set it on vertical than horizontal scrolling works well