"SEAM" on vase mode

[Tinchus2009]

What happened?

Im not sure if this is abug. Im printing simple cone shaped objects and on all of them I get a sort of seam. It is not technically speaking a seam, there is no retraction made of course, this "seam" is made by s slight movement of the perimeter at the end of every turn to increase diameter I guess, but I dont understand why this round perimeter is not "closed" at the end of perimter creation. I have tried doing the same on cura spiral mode and somehow this efffect is covered / not present. I have attached pictures, stl and the project. The picture might look like "it is nothing" but the picures hiddes the deffect a lot, in real life if much more visible.

Also I think there is another bug on vase mode: vase mode should not make retractions. If you activate vase mode and in the printer config you have "retraction on layer change", this setting will take affect, seems a retraction is made and on every turn you can see a retraction ahppening. I think this setting should have be deactivated together with the other settings when you activate vase mode. (this setting is not active and not happening on my report)

Also a question: is there any way to have bottom layers on vase mode?

Thanks in advance for the help

Project file & How to reproduce

vasemodecone.zip

Version

2.5.60.0

Operating system

Win11

Printer model

Custom FDM cartesian