If a timeline recording has records do not end before the recording is stopped, their record bars will appear on top of the current time marker. Unlike the other markers, which we expect to stay fixed (and therefore have records that extend past them), the current time marker should never have things after (or on top of ) it.
Created attachment 394951 [details] Patch
Committed r259235: <https://trac.webkit.org/changeset/259235> All reviewed patches have been landed. Closing bug and clearing flags on attachment 394951 [details].
<rdar://problem/61073967>