Clip markers not visible on clip

Please help.

I have a multitrack session in which I add clip markers (M).

The markers appear in the Markers panel.

The markers do not appear on the clip.

The problem seems specific to my multitrack session—if I start a new multitrack session, import a file, and add clip markers, they appear in both the panel and on the clip.

Did I inadvertently disable the display of clip markers? Am I not understanding some behavior of the Marker functionality?

This has happened to me before...and I'd like it to stop happening now.

Any insight, ideas, or answers are greatly appreciated.

Thank you!