Hey there,
Here is a short clip of what is happening in the blend space, as well as an image of the animation blueprint.
Also added it in a state machine as a test to see if it would’ve changed anything.
And here is a video showing what is happening in the blendspace between the two animations. First showing the barrel spin animation running, then the blendspace. The jittering happens throughout the entire blendspace, until it reaches either the start or end of the blendspace where the respective animations have 100% influence.
Looks like the blendspace is trying to start from the beginning each frame.