Xfinity DVR Vizio Smartcast QLED TV distortion tiling flickering pixilation issues

We seem to have the same distortion tiling flickering pixilation issues that others have been experiencing for quite some time. A technician came out today (Fri, 7/5/24) and changed the splitter, installed new cable lines, tested everything but we're still having distortion/tiling/flickering/pixilation issues.  He believes we'll need to upgrade to a new DVR box (current version). Awaiting to hear back from Xfinity Support.