Stock first person arms running animation randomly stopping

This is the stock first person arms from Unreal and every animation also came from Unreal. So I haven’t done anything to any of the animations, the only thing I have changed is the skeleton of the arms by adding a right hand socket.
So how do I go about finding what you are talking about? My pawn uses the SK_Mannequin_Arms Skeletal mesh with the FirstPerson_AnimBP_C blueprint (again, both are from Unreal and made by Unreal and are provided in the “starter content” of fps shooter).
The picture I last showed you is of the FirstPerson_AnimBP with the AnimGraph open. So if it is not here, I do not know where to find it. That node I circled when I right click on it and select “Find reference” to try to get more info on it, these are all what pop up in the results.


But for whatever weird reason, I can not find anything in this blueprint where it shows all the animations being selected with it (The falling animation, the jumping, and the running foward all provided by Unreal included with this blueprint), even though it 1000% uses all of these animations because obviously they all work except for the running fwd one which stops looping in my case.
Again, I apologize for the ignorance. I really want to figure this out, and I will be forever grateful if you stick it out and help me.

Here are some more pictures for context

@VisAgilis I have edited my comment to include more photos