When stowing away on the orange ship on Xenon at the start of the game, there's what looks to be a priority bug when animating the raising of the landing gear legs in ScummVM. The left leg, which is on the far side of the ship, is being drawn on top of the ship instead of behind it. Screenshots attached, along with how it looks in Sierra SCI.
Save game in front of ship attached.
ScummVM: 1.6.0 and 1.7.0 Nightly Win32.
SQ4: 1.1 English Floppy