i did my first animation render using Blender 2.8 and the latest Crowdrender addon. i used 2 render nodes and local PC to render the 350 frames of a test animation from Blender.org but for some reason i have lines showing were each image has been split between each computer to be rendered and then put back together, i am sure its a simple issue or a setting i have missed on one of the computers i have used but once i produced the final mp4 video the lines cause it to flicker and one lighter tile part of the images moves around the video.

Has anyone else had this issue and what do i need to do to solve the problem

many thanks in advance.