Issue was resolved after going through a complete MSFS2024 WASM purge and A350 reinstall.
One issue with charts remained, on long haul flights the route map turns white or black and can't be restored,
despite Navigraph subscription tested and navdata updated. I tried to choose other maps as well with no success.
Route map displayed ok during the 1st couple of hours :
A350-900 KDTW->RKSI ((No time acceleration)