The image clip you provided doesn't show enough context for me to understand what you're seeing personally.
Perhaps you could include a full screen capture, in lower resolution if necessary, to give a more complete idea?
From looking at
https://developer.roku.com/docs/references/scenegraph/list-and-grid-nodes/timegrid.md
while I don't know if that exactly reflects current Roku OS UI, I would expect that showing column time labels is completely expected.
That is different from a 'clock' however that would show the current time minute by minute as in the Scene overhang.