Cannot move Regular tab to another Regular window if an Incognito window is technically the "Next Window"

[misterpyrrhuloxia]

If I try to move a regular tab to the "Next Window", but the "Next Window" is technically an Incognito window that I opened previously, then what ends up happening is the Incognito window becomes the focused window and the Regular tab that I tried to move doesn't go anywhere. I know that it's not possible to move a tab to an Incognito window and I have no desire to do so.

Should an attempt to move a Regular tab to the "Next Window" just bypass Incognito windows when defining what the "Next Window" should be? Is this behavior a bug or is it actually a deliberate design decision? If it's a bug, is it possible to fix? If it's a design decision, what's the rationale behind the design of this particular behavior?