The Mirage III C.70 currently has a bug where in the preset menu there is a slot for a conformal fuel tank but does not show up in the menu also activating the booster for the mirage III C.70 sets the back of the aircraft on fire. there also seems to be an issue with the JATO booster but its difficult to describe.
You can still add it to presets.
Never experienced that. The flame of the SEPR rocket is impressive though…