This is an ongoing issue that I'm surprised hasn't been raised before:
I have a nested composition with a time remap.
If I use "Open Layer" I'm taken to the correct timecode in the "Layer" window.
However, if I use "Open Layer Source" I'm taken to a completely different timecode in the source "Composition" window, and the playback head in the composition with the nest is teleported to a new unrelated position if I check back.
Additionally, if I have the two timeline windows open at the same time, moving the playback head in one results in a similar mismatched point in the other.