Mesh getting invisible when moving

I’m making a aim lazer. I use beam partical and mesh using same material. Both gettin invisible when i move the lazer. I’m setting length of the lazer in tick. I couldn’t find a solution or some other way to make a aim lazer.


First in beam partical spawn many times and this couse increase in brightness, i set spawn count to 2. Secont playmode view is not final resort. When i launch game it looks ok. I’m new to UE, I thought it will be like in the viewport(unity habit)