Add MWE and mess around with pushback bugs

[alerque]

Included so far is an MWE for #1185 and a bizzare hack that gives better results (probably by covering up the actual bug).

[Omikhleia]

This 3+ year old PR never came to fruition as-is and now has conflicts.
Due to inactivity, and as part of backlog cleaning, I would have been tempted to close it, but the topic was interesting, and the reasons why it didn't eventually occur are unclear.
So I'm adding the "pending closure" as a label - As a last chance for contributors to eventually say their word.
After some period of time, this inactive PR will be closed without further notice.