Canvas Size Issue

So, i have a very specific and minute issue I am trying to resolve. I design, layout, and set print ready art for beer cans. So the way the CMYK printer works is very precise and intentional. THe template needs a 207.35mm x 146mm Artboard file in Illustrator (it handles the printer better). I have to build art files in Photoshop then place in Illustrator exactly to match masking needs and align precicly on the seam for the can. When i build out the art file in Photoshop, i set the canvas to the size needed. BUT when i set 146mm height, it automatically reverts it to 145.97. That small amount leaves a very noticible line and it just is not going to work. Is there anything anyone can help me with the ensure when i set a canvas size in Photoshop that it stays the exact size i set it for? This is CC programs updated regularly so whatever is the current build on both.