Can someone else try some of these games to see if its happening to you as well.
When I use the BGFX backend, in either D3D or OGL mode, these games will just crash out of Mame.
Tekken games, Ray Force, Ehrgeiz (Namco)
Tech Romancer, Star Gladiator (Capcom)
Its only happening in these Playstation based Hardware games as well, all 2D based games run fine as do other 3D games (SF 2049, Guantlet Legends) with the BGFX backend so that would suggest its very specific to something BGFX doesn't like with this driver.