If you just added coolant after it had boiled off when the Bronco overheated maybe you still have air in the system that has to vent out by running it.
This is a Bronco enthusiast site so there is a lot of passion about the perfect color. But I believe ( and suspect that Ford believes through marketing) that the majority of Bronco purchasers only want bland colors that won't hurt the vehicle's trade-in value when they get something else in a...
And then there was this dealer who took a chance on a color wrap
https://www.bronco6g.com/forum/threads/local-dealership-desperate-to-sell-their-stroppe.131589/
If you really want to lobby a color, buy your Bronco and have it custom painted. You will be the envy of all. Ford will have no choice but to adopt the color. To image that Ford would build just one or two custom color vehicles on request at a the same price as a mass produced one is just...
50 years of changing my own oil with OEM plugs, never a drip, never a worry.... It's a car, not a fighter Jet. The o-ring is not going to fail unless you damage it.