In my case Lisboa flips, but it's only size 1 and Lagos is there too(still Cordoban though). Hmm lose a few turns on the capitol vs extra city..
As long as the city is on the spawn location it's fairly ok, but the cordoban AI likes the position 1NW which still kinda sucks but gets those lovely whales
I can imagine that this might also happen with Burgundy(Dijon area) and the Netherlands (Amsterdam area).
With Burgundy it might be to their advantage but the Dutch UHV could get screwed if the player accepts a flip and the city isn't on the right location for the 'settle merchants UHV' (unless the UHV isn't focused on the tile with the dye anymore)
The initial buildings based on your civ are still there though, so the Dutch would still get a nicely upgraded city.
A good question would be, does razing it reduce stability?
In my first attempt I razed the city but I wanted to check how it looks if I kept it. So I reloaded from autoplay. I get two results, if I take the save from the initial spawn the city doesn't flip and my units are pushed out. If I reload earlier the found to the NW thus making the flip undesireable for me
anyway the being pushed out without flip part after reload seems not right to me
I hope all this makes sense