Please auto-merge edit-summary on edit merge
Previously, when I made an edit to a post and then quickly started another edit to the same post, I was shown the edit summary of the old edit and so I could just modify it to reflect the additional changes.
So, for example, I made an edit with the summary “change 1”, then made another edit, where I changed the summary from “change 1” to “change 1; change 2”.
I think this worked well.
But recently, I see different behavior: when I start a new edit quickly, the old edit summary is not shown, but the edits are still merged. But this means the edit summary was lost. I could try to create the correct summary, but I may not remember what exactly the old summary was and I also don't know the rules for merging edits.
For example, I made an edit with the summary “change 1”, then made another edit, with the summary “change 2”. But the result is only one edit with both changes, but only one summary.
For a concrete example, see this question. I first made an edit to the title with the summary “rm tag from title”. Then I made an edit to the body of the question, with the summary “code formatting”. But the two edits were merged, so the first summary was lost.
Why did this change? Could the old behavior be restored? Or alternatively, could the summaries be merged automatically?