Belt now collides with rail in south orientations [0.17.50]

[SuHwak_01]

Hi,

https://youtu.be/lpG4ZoyZIjY

The belt where the corners meet the rail in the south orientations now seem to have not enough space, but in the north orientations it does have space (like before 0.17.50).

I recorded this video in a 'lab' but can reproduce this in a vanilla game, ghosted and in freeplay.

A few of my existing blueprints all of a sudden started this behavior and also removing the belt in the south orientations in save games!