Play an infinite loop of animation by specifying a Slot.

We have created a simple ABP as shown in the image below.
image

We want to play the face and body animations separately and blend these together. The blending itself is already working well.

However, I am having trouble getting the animation from the blueprint into this slot in an infinite loop.

When playing from Anim Montage, I could not specify the slot.

When playing from Animation Sequence, I can specify the slot, but I can’t seem to get it to loop infinitely.

I tried setting LoopCount to a negative number in the hope that it would loop infinitely, but it would not play.
I considered setting a very large number, but my concern is that some Face animations are very short, and there is no guarantee that this loop could be consumed. We would like to create a proper infinite loop if possible.

I would appreciate an answer.