Possibly got a similar problem. CM (SF, CW, FI, BS) been working fine until about a week ago, now can't load scenarios - hangs, and ultimately gives an error message about out of graphics memory... happening across Steam/not-Steam.
Don't think I've made changes to them (some mods, but not across all).
Tried updating drivers.
Will submit more information as I experiment.
(Running with Radeon RX 580, 8Gb... again, fine until about a week ago)