The item that causes the issue is Edge, not Explorer. The tweaker is not able to restore the position of "modern" items, such as Edge, on the taskbar. Since Explorer is probably pinned, the tweaker gets confused and loses track of its original location.

See also:

https://tweaker.userecho.com/communities/1/topics/337-some-options-eg-grouping-dont-apply-immediately-for-modern-apps-in-windows-10

Changing to "Idea" since that's not a bug of the tweaker.

Closing due to a lack of feedback.

Changing to "Idea" since that's not a bug of the tweaker.

Closing due to a lack of feedback.

Closing due to a lack of feedback.

Closing due to a lack of further feedback.

Closing due to a lack of feedback.

Closing due to a lack of feedback.