The Path Alias element is a static 30 weight. This means that if you putz with the form display of a node content type with the path module enabled, the field will sometimes "unexpectedly" show up in the middle of everything. We either need a way to move the path alias field around on the form via the UI, or we need to pick one end or another so it doesn't get in the way.
I personally vote moving it always to the end like I did with taxonomy in #2655328: [PP-1] Relations Form Element static at weight 10 → .
You can see this in path_form_node_form_alter().
Active
11.0 🔥
path.module
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It's likely this issue predates Contrib.social: some issue and comment data are missing.
Created a MR having a fix. Here is a patch version of it.
Applies to 10.3.x, 10.4.x and 11.x branches.
Improved #20 to fix issue occurring when the widget used in non entity forms where form_display will not be present.