source monitor playhead position not show the real timecode when i open timeline in the source monit

Another one for comparsion

But it is not constant, sometimes its showing 00:00:00 and sometimes the real sequence timecode (in my case the starting sequence timecode is 06:28:23).
Please see the attached screenshot compare to the previous screenshot.
Same secuence.
It is looks like a bug.

The Source monitor shows the 'source' ... even if it's 'on' a sequence.

Yea, that's confusing for the user, and at times I think, for Premiere itself. And is kind of a pain at times.

Out of curiosity, what are you doing with the sequence loaded in the Source monitor?

I opened the sequence at the source monitor so at that case the sequence is the source

I set start time to the sequence of 06:28:23 but at the source monitor it still start at 00:00:00

No

Is the timeline a sub sequence?