Did the grace period for edits on posts recently go away? Or did the mechanism break maybe?
I was recently editing an FAQ post on MSO, and after saving the edit, realized I changed something which I didn't intend to.
No problem, I noticed this well within the 5 minute grace period window; I edited again to fix the mistake. The edit summary from the previous edit appeared in the edit summary input below the post, I made my change and submitted it.
I checked the revision history of the post later, and noticed that my grace period edit had been logged as a separate edit, with the same edit summary as my prior edit.
No comments had been made on the post since the first edit, and none of the other criteria for invalidating the grace period appeared to apply.
For science, I tested this on a post of mine in the sandbox (all CW posts), and was able to replicate the behavior. I
wasn't able to replicate this on a non-CW post was recently able to replicate this on Stack Overflow proper as well (first edit, non-CW post).
Did the editing grace period on posts break? Was it turned off intentionally?
This appears not to have the same underlying cause as this bug: All post history events are now incorrectly showing as edits in post histories and timelines after all, since that was officially fixed, but I'm still able to repro this on my sandbox post.