Yes, what normally happens is, you go to propose a merge, you get unexpectedly taken straight through to the merge completion page, and when you bail out of that, the invisible proposal suddenly appears on the profile.
Then you can't report it, because there's nothing to report any more.
But in this case, the PPP is stabilising the bug. You can prove that the pending merge exists, but it stays invisible. For me anyway - don't know what'll happen if a Leader tries it.
Note there's no record of the proposal in the Change Logs either. It would be interesting to know if emails were ever sent.