[Vanilla Bug] Cancelling Wonders (or at least Stonehenge)

[ubereffect]

While building Stonehenge, I noticed a bug (or feature). When I have Stonehenge in slot 1 of the production queue, if I right click it or drag it over to the garbage can, it cancels it outright. Doesn't matter if Stonehenge was half build, the tile is now clean, and all the production invested into it is gone. (This only happens in slot 1)

I tested it with CQUI, then reproduced the same bug without CQUI or any other mod. I'm posting this here hoping CQUI could come up with a fix (or work around) to keep us from accidentally cancelling a wonder, and all of it's production.

Stonehenge is the only wonder I tested, not sure if the issue is unique to Stonehenge, or applies to all wonders.

• OS: Windows 10
• Version: 1.0.0.290
• Expansions: All expansions and DLC, including Rise & Fall, and Gathering Storm

Test - CQUI - 27 1920 BC.zip

[ubereffect]

I should add that I have tried doing the same with districts and units.
And I'm happy to report that no districts or units were lost in testing.

[ubereffect]

Issue still present with latest version of CQUI posted on GitHub yesterday. Tested it with a fresh game, build pyramids this time, waited until 1 turn from completion, right clicked and deleted all my production (doesn't even give overflow). To be certain, I even started producing pyramids again right after deleting them, and check again on next turn, production was reset.