More likely than not, this is due to the ABS system I'm using (Phoenix KageDesu's ABS-Z). It's great, but it definitely causes wonkiness with other non-PKD plugins. The jump system works well, and if I'm flush against a wall, the character won't jump through it, but if I start the jump with a tile between the player and the wall, the player lands in the wall. I can paint regions if need be, the system is worth the effort, but it's just tedious.
Viewing post in Hakuen Studio Jump System for RPG Maker MV MZ comments
Yeah, they may not work together. There are two impulse types, one checks if the player is dashing and the one if the player is walking. But the walking part may be different because of the abs system.
But you didn't answer me, using the Terrain tags to block the jump would work for you? This is just a matter of you flagging the walls with a terrain ID on the database, instead of painting it on every wall.