When making a path of concrete blocks that includes carpenter slopes or stairs, concrete slopes and stairs will briefly act like a whole block when trying to run up them, causing the player to "slide" to the side instead of going up. This issue does not occur with concrete slopes and stairs alone, only when combined with a concrete path leading up to them.

Picture attached to clarify, since I'm not sure I'm describing the scenario adequately.

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Concrete blocks in chisel have a known compatibility problem with this mod. It alters player velocity away from the block, I believe, which when used in any non-cubic block produces weird movement behavior.

I see... I thought that was most likely the problem. Well, it's easy enough to work around. Thanks for replying to what I'm sure is nigh-on the fiftieth time this "bug" has been reported.