The message differing significantly is on purpose, as this was dictated by product/design. Apparently the same message was tried on desktop, but people objected to the fact that it only mentioned one user as they felt like this was unfair to the other editors of the article. So the desktop version was reverted, but the mobile version was left in place. Product and design prefer the version that is on mobile and the community prefers the version on desktop, so we are left with an awkward stalemate of differing messages. I'll CC Jared to see if he has any thoughts on this.

I'm also not sure what's causing the flash. Will have someone investigate further.

@Jaredzimmerman-WMF @MSyed On desktop the interface says: "This page was last modified on 10 January 2015, at 12:25". On mobile it says: "Last edited 1 month ago by Hafspajen". The fact that these differ is not ideal both from a UI consistency POV and from a code cleanliness POV, however, this seems to be the result of a stalemate between the WMF and the community. Is there any way we can resolve this situation or should we let sleeping dogs lie?

I split off a separate bug for the flash issue: T89310

I'd propose that we merge on a consistant "Last edited 1 month ago by Hafspajen" but have a tooltip on the simplified time, with the full, detailed time. Does that work for everyone?

In T89219#1033590, @Jaredzimmerman-WMF wrote:

I'd propose that we merge on a consistant "Last edited 1 month ago by Hafspajen" but have a tooltip on the simplified time, with the full, detailed time. Does that work for everyone?

Works for me. This seems common practice in other web apps as well and would user expectations I believe.