I’ve printed similar objects with a different colored PLA, but I ran out of it and switched to this.
Is it possible that this could be influencing the outcome?
I have tried reducing the printing speed by 50%, but this did not seem to have a significant impact.
Check if your print is wobbling when it reaches that height. If it does, you may need to add support to fix that - a few organic support touch points halfway up should help
Could you give me advice on how to do that? Is it something that I would have to add manually in a 3D modeling program, or is there a way to do it in Cura?
I am not too familiar with Cura, but I don’t think they have the ‘support painting’ feature of prusaslicer and the likes that would allow this. In those, you can paint where you’d like your support to touch or use modifier meshes to selectively add regions that should be supported. It’s the easiest way I know, though I have heard that Meshmixer also used to be able to do that… but I’ve never tried.