I have some diagonal slopes in my game, which uses the PMO. The slopes work fine, until I shrink the player object to 0.5 of it's original size. When I do this, the slopes act as if they have some invisible wall at the bottom of them. They're pixel perfect in terms of how they're connected to other floor tiles.
Take a look at the below video. You can see how they function fine when at normal size, but it's like there is a large vertical wall that's preventing the player object from advancing. You have to jump pretty high to get past these invisible walls. It only seems to happen the bottom of the slopes, not the top. What's going on here?
(The slope here is actually 2 slopes connected to each other, which is why it sticks half way)