Bright white lane markings on instrument panel

[MaineStephen]

Has anyone else noticed bright white lane markings on the instrument panel? I’ve only seen them a couple of times and they dont’t seem to last for more than a second or two. They are noticeable brighter than the usual white lane markings required to enable autosteer, and I was once able to enable autosteer while these bright white lane markings were displayed, resulting in a different color blue autosteer lane marking. Any thoughts what these markings may mean?

Thanks

Steve