Railing Post to Stair Stringer Mystery

[SSStudio]

I'm baffled.

I have an Assembled Stair setup with steel channel stringers.

The stair hosts a railing set for the stringer position (not the tread).

The stair run is set for center.

The railing works great on the right-hand side (as you go up).

The Baluster/Posts stop on top of the Stringer channel flange and the cuts conform to the slope as intended.

BUT NOT on the left-hand side !?

See the attached images.

It doesn't matter if I mirror the good side to the opposite; or copy it to the other side and use the flip arrows; or even if I start over fresh with the same railing style and use the host to Stringer tool - it will not terminate the Baluster/Posts to the Stringer properly.

To save you from having to ask a lot of questions on the details, I have attached the Revit 2021 model of this, hoping you can all take a shot at it...

Let me know if you figure it out, and have a successful result.

[mpukas]

I'm having a similar problem, but I can't get the railing to host to the stair stringer on either side. I'm baffled too, and have wasted hours trying to trouble shoot it.