Is this a correct ruling?

[DG]

Originally Posted by Justme561

Ground ball to F6, throw to F3 pulls F3 off the bag towards the plate. Batter-Runner avoids contact and goes past 1B without touching the bag. The B-R was able to keep both feet in the running lane. The official ruled that there was no interference. F3 then walks over and touches the bag before the B-R can return. The B-R is called out. Non-verbal appeal & no tag needed.

Don't know why the BU would do anything other than signal SAFE ("ruled that there was no interference" is kind of fuzzy). If F3 walked over and touched 1b it would have to be clear to the BU that he is making an appeal of missed base, some kind of clue, say something, etc....