Last modified: 2013-12-05 21:46:31 UTC
Eg. http://ee-flow.wmflabs.org/w/index.php?title=Sandbox&workflow=050ac9f53ec3f00fc8b1fa163e68c4ac&action=topic-history If I mouseover the bottom item, "1 day ago", then it blinks on-and-off, and also the exact timestamp also blinks on-and-off to the right of it. Moving the mouse-pointer around makes varying behaviour. Sometimes it just goes invisible and remains that way, until I move the mouse-pointer again. Note: This only happens with the specific events (down-arrow to the left), not the bundled groups ("+" to the left).
The WMF core features team tracks this bug on Mingle card https://mingle.corp.wikimedia.org/projects/flow/cards/575, but people from the community are welcome to contribute here and in Gerrit.