Resolved ProBuilder edge not properly aligning with global grid

EDIT 2022-08-25: Seems this was some kind of bug. After updating my editor to 2021.3.8f1 (and also updating Probuilder) and trying this again, it works easily as expected.

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Hey all,

After finally starting to understand grids properly, I was on track to create all the (simple) models I needed using ProBuilder... Until I came across... this. This just shattered all my understanding of Unity grids, I have no clue what is going on anymore.

With grids on, and with the "Edge Selection" tool of ProBuilder, I am unable to align 2 edges so that they are level/straight. Here is a quick GIF: (left one seems to be perfect, right one won't align)


and a zoomed in screenshot of that edge on isometric camera:


Grid settings:


Any reason why these edges are not properly getting aligned together along the grid? Also, this pipe was generated using ProBuilder if that helps. Could this just be a visual bug? If I zoom in all the way on the right side in isometric view, I can see the start of the different color of the checkerboard-texture (which is perfectly cut off from the left side) so I don't think it's just a visual bug with the edge.

These exact grid settings have been working for similar modifications on other models, so I'm really not sure what's going on here.

Any help would be greatly appreciated.