I would suggest posting on OSM's Q&A forum:
https://forum.openstreetmap.org/viewforum.php?id=10
or try https://www.reddit.com/r/openstreetmap/ to see if anyone can help you out if you run into a similar issue in the future. But since the road is now fixed, all we have to wait for is the servers to generate a new tile.

I looked at the road's history and I think I just realized what you were talking about.

The reason why the road wasn't appearing at some zoom levels was because someone deleted the highway=primary tag back in July and it only was fixed 3 days ago. Some of the map tiles might not have been regenerated yet.

Hi there,
I removed the bridge tag from Main Street since it isn't a bridge. The bridges at Maple Street, Bridge Street, and Division Street look like they've already been mapped correctly (splitting the road into three parts by double clicking to add nodes, right clicking to split the road at the new nodes, and only adding the bridge tag to the part that is the bridge).
The display issue on some zoom levels of the map is from new tiles being generated after you made the change. Because bridges are "layer=1" by default on OSM (layer=0 is the ground), it looks like it is now hovering over the roads it intersects. It may take a few hours for the map to load some new tiles after my fix.
I hope this answered your questions!

What are these supposed to be? The only buildings that could be considered castles in Bucks County are Fonthill and the Mercer Museum in Doylestown.

I'm not sure how FooBarTracks caught this, but I verified his findings by manually looking at all the nodes you modified on OSMCha. https://osmcha.mapbox.com/changesets/53509560

Your edit removed the place=* tag from the Pacific Ocean and South Pacific Ocean, please add them back.
https://osmlab.github.io/osm-deep-history/#/node/305640005
https://osmlab.github.io/osm-deep-history/#/node/305640292

Note: I left the status=inactive tag

This changeset deleted the Voorhees label off of the map. Reverted in 52942668.

It looks like you created a whole bunch of objects near lat 0 long 0 (lovingly called Null Island). Did you use a JOSM learning tool and accidentally upload that data?

This revert deleted a section of PA 179 in New Hope, PA and County Route 634 in Ewing, NJ. I fixed these in 52746484, 52746570, and 52746726.

Hey tws45, looks like you accidentally removed the place=town tag for Princeton, New Jersey. Without the tag, the "Princeton" label disappears from the map. I went ahead and fixed it for you. Please be more careful in the future if you need to edit place tags!

Please do not vandalize the map by adding falsified information. I've reverted this change as well as all other changes you have made to the Woodmont neighborhood.

Hi user_5359,
I'm local and I can confirm that this is a restaurant/bar, not a hotel (despite the name). This actually should be an amenity=restaurant or pub since they serve food.

Why did you change all of the newly added natural=wood tags to leisure=park? Looking at your history of vandalism with drawing out John Hanke's name and swastikas in a nearby park, I'm guessing for Pokemon Go?

You don't learn, do you? Reverted in 51631406.

Very funny. (Reverted in 51495995)

This is not profanity. Dick's Sporting Goods is the name of a sporting goods chain in the U.S. See https://www.dickssportinggoods.com/. There is one located at this point with the address of 530 Nassau Park Boulevard, Princeton, NJ 08540.

I reverted this in 51014800. I reviewed some roads you changed in 51015531. Blair Mill Road and Dresher Road are higher traffic and should be tertiary. I also made some of the roads in shopping centers unclassified/minor.

See changeset #50872893

Can I ask for a reasoning for your mass demotions/promotions of road classes? You changed PA-611 to primary when it has been listed as a trunk route for 6 years. What's even stranger is that you left the northern portion in Warrington as a trunk road. I feel that PA-611 is on par with PA-309 (also a trunk road) and is a more major route than other Pennsylvania state routes it intersects (like 263 and 132). Mapbox uses this data and you shouldn't demote major roads without discussion on OSM forums.
You also promoted many smaller residential roads to tertiary (which may be fine), but you only partially promoted the road while leaving other sections residential. You also made the entrances to shopping centers tertiary class and a car wash service road(?!) tertiary classes when they should have been left as service roads, driveways, drive-throughs, etc.
Lastly, when you were changing these entrances, you left the PA-611 line jagged. iD and JOSM include line straightening tools that you should use.

I've also noticed that you have been making similar road demotion/promotion changes throughout the northeast. Are these being discussed with anyone?

Please make edits and in the future, PLEASE add a comment on what you are changing.