Not a bug phrase xfmg_media_x

I translated this phrase xfmg_media_x when i ran XF 2.3 RC but now (2.3.0) editing it has no impact on public view.
I purged browser cache, server cache but impossible to get the new translation displayed. Works well for his siblings from XF and XFRM

Apologies, i edited the wrong phrase, no bug here except in my brain...