HDR issue on LG B1 Oled (2021) with fire stick 4K

I have LG B1 55 Oled tv from 2021 and since a couple of days I've been having some trouble playing HDR videos with stremio on my fire stick 4k. They play completely dark.

I have no issue with the same HDR files on the native LG stremio app. I tried messing with the settings both of the tv and the fire stick but with no luck.

It started this week, before I was able to play HDR videos with no problem.

Anyone else had the same problem?

Could anyone help me figure it out if it's a setting I have to change?