Lines near the (north) pole

Running Dawarich 1.10.3 on Debian (TrueNAS)

I had a flight that went over the North Pole. Dawarich doesn't really seem to handle it well at all.

Here's a cut screenshot of a flat map:

What's going on over to the right at the very top? There have been some inaccurate points inbetween that I've removed, because my phone's GPS seemed to have some sort of maximum latitude that it couldn't report over. But the route is still doing that weird kink for no reason. I do have the "raw" setting on, so I'm seeing all points.

Here's a screenshot of the globe view:

Well, it doesn't seem to do straight lines at all. First, that kink really makes it look extra weird. But all of the supposedly straight lines are now curved. It's in this view that they should actually be straight, and curved on the flat one.

No file or test is named. Start by reproducing the flight route in Dawarich 1.10.3 with the raw setting enabled, comparing the flat-map and globe views around the North Pole; done means the route no longer has the unexplained kink and appears straight or curved appropriately in each view.

Written by the indexing model from the issue text.