Render target freezes/has range problem?

Tryna render a UMG onto a mesh. Using this

It ‘works’ but sort of strangely. The render target on the mesh sometimes will pause and stutter and freeze and only come back, seemingly, when I move the player about. Here’s a video to demonstrate

Look closely when the red cryo chamber object ‘opens’ . In real time it goes smoothly as it should. On the render target material on the ‘pad’ mesh the FPS player is holding, it freezes twice.
Other weird things happen like if the player doesn’t move at the start of the level or is too far away from the scene capture it freezes as well or the BP pictured fails to set the texture parameter to the RT at all.

Here’s a more detailed thread on how I made this whole system.

https://forums.unrealengine.com/development-discussion/rendering/1792402-render-target-material-stutters-video-and-pics-included

But I do think the problem is here specifically.

EDIT: Forgot to specify I have a scene capture rendering to a material and that material is being used inside a UI and that UI is being used as a render target for my pad mesh.