How do I prevent clipping through a sprite mesh?

I'm working on a dirtbike game, using a tiled background and the mesh editor, but sometimes the mesh just "gives up" and the player clips through it like it isn't there. Then I fiddle with the position of the problematic nodes until it starts working again. Is there a restriction I'm unaware of? It doesn't seem to have anything to do with the severity of the distortion, as it can occur even when I'm trying to have a flat-ish stretch of mesh. I tried seeing if making the mesh triangle equilateral or isosceles made any difference, but I couldn't come to a conclusion. I do know that having overlapping nodes causes clipping, but it happens even when I make sure none of the points are overlapping. Am I doing something wrong, or is this just a bug/limitation of the mesh editor? Thanks!

There aren't any limitations, it should just work. It's hard to say more without further information like a sample project. If you think it's a problem with Construct please file an issue following all the guidelines.