SCUMM: Loom (EGA) - Path finding or overlay issue at Dragon's caves

[antoniou79]

This in on Windows 10 x64, with a recent local build from HEAD master of 2.6.0git, testing with LOOM DOS EGA, using the orchestral audio feature.
For this I've set my Audio settings for the game to use "MT-32 emulator" as Music device. You may also need to do that for the attached save game to work.

How to reproduce:
Upon entering the caves, and casting the spell for Night Vision, walk to the cave entrance to the right and enter it.

What happens:
Sometimes but not always, Bobbin won't be shown to enter into the cave but instead he walks a bit to the left while clearly being outside of it. The game then teleports him to a random cave.

What should happen:
Bobbin should go into the cave and then be teleported to a random cave.

I'm including a save game at the point of entering the cave, and a screenshot showing Bobbin a bit before the game teleports him.