Cura print preview shows Z-seam display error in new profile

[WexelCreation 3]

Hello,
I'm trying to set up a new printer in cura. The Biqu BX.
There is no inbuild profile for the printer so chose the Biqu B1 and then edited all machine settings for my printer.

It works, but Cura has a weird display problem. The prints seem to come out correct, but it's almost impossible to catch problems like holes in the model before printing.
The preview print shows pretty big holes at the Z-Seam.

Here are some example pictures:

 

First two show the problem on a XYZ cube, then on a real object, which shows these massive holes.

 

The next picture is the same cura instance but switched to my other printer, with the same settings as the first image:

 

Why is my new profile displaying these massive holes and how do I fix this?

 

Does anyone have any idea on how to fix this issue?

 

This problem is in both Cura 4.8 and Cura 4.9.1

[WexelCreation 3]

Found the problem. This appears to be caused by the experimental "Enable Coasting" option, that appears to have been enabled in the default profile.

 

It's a weird way to display this.

 

Can't see a way to delete this post.

[gr5 2,172]

We prefer not to delete postings like this as they can help other people with similar questions.  In fact your post is particularly informative.