This is a hard bug to explain. Basically if you are in water and you are coming out of the water and there is a solid combo next to it, you can come up ashore on the solid combo. S = Solid Combo, W = Water, and N= Normal tile:
WWW
NSS
If you are 90% against the solid combo and only 10% on the normal tile, you will still climb out of the water on the solid combo, even though it is a solid combo. I think this should be fixed because the detection is very off on getting out of the water. Basically this started happening ever since the new water detection happened. Also, I have 8-way walking if that has anything to do with it. anyways:
Say you have Tiles like this where S = solid combo, W = Water, and N = Normal tile:
WWSS
NSNS
NNSS
Okay, the reason why I made this example this way is because as you can see by the diagram, there is no way to get in between the solid combos to that normal walkable combo. However, with the bug you can. If you are in the water and are like 90% on the Leftmost Solid Combo, and 10% Normal Combo, you will be on the Solid combo when coming out of the water, if you press right, you will walk to that normal combo, making you stuck. This is just an example why this bug is evil.