2D_Platform with jump-thru behavior + slope = collision_bugged

Example:

mega.nz/file/qM1XxJjC

Bug forgotten since construct 2 all_version and limiting the possibilities.

For this you just need one (platformer2D) and 2 platform (jumpThru) one of which is sloping (any angle) through the other horizontal, the player always falls and this only has an effect when there is has a slope.

It's a weird setup - why have large overlapping jump-thrus? - but I also don't think it's a bug as the documentation notes that jump-thrus don't support slopes.