Expected Behaviour
When standing on a Biome Makeover pressure plate, the player would pass through it, as they do vanilla pressure plates.
Actual Behaviour
When standing on a Biome Makeover pressure plate, the player collides with it. This can be observed in the F3 menu by watching your y value as you walk over one: when walking over a vanilla pressure plate, it doesn't change, but, when walking over one of yours, it does.
In addition to being behaviourally inconsistent with vanilla, this issue is exacerbated with the mod Plated, which allows pressure plates to be placed sideways. Notably, players can stand on Biome Makeover pressure plates when they are sideways with this mod installed.