"No perimeters on bridge areas" setting and arachne

[thisloginalsotaken]

What happened?

This setting is grayed out when Arachne is selected as perimeter generator. But it still works (affects slicing), if you enable it prior to switching perimeter generator settings.

It looks like a visual bug and the setting does not have to be disabled to reduce confusion.

Project file & How to reproduce

This model slices correctly (with no perimeters around the bridge) both with arachne and classic perimeter generator, if "No perimeters on bridge areas" setting is set to "keep only bridges"
bridge.zip

Version

2.5.59.12

Operating system

No response

Printer model

No response