Since firmware 5.20 the screen on my garmin edge 1030 plus regularly blanks out for several seconds during navigation. In particular, when this happens, there is a diagonal line from bottom-left to top-right and everything below the line is shown, but nothing is shown above the line. This usually lasts for. several seconds and is really annoying.
As part. of troubleshooting, I updated the maps bit that did not help.
Cheers
Erik