I have some FX shots that composited several tracks using some of the older Sony Vegas plugins - cookie cutter and color balance mainly - and in a previous build of Vegas 15 they rendered perfectly. I had to re-do some things and have updated to the latest version, and had to re-render them and now they render with strange flashing of light levels.  I was rendering from various 4k camera originals to Prores 422 HD but the same thing happened rendered to XAVC-i HD.  Everything is exactly the same as when the scenes rendered perfectly. So is this caused by the newer Vegas build? Computer is  i7 12 core 48 gb RAM Win 10 64 Intel graphics 630.