I am seeing some very odd (caching?) things happening at the moment.

Last night I did some editing that added a beach (w1333595340) and a few other things including water bodies.

This was partially visible about four hours later at zoom 15.62 and I grabbed a screenshot:

and also partly visible at zoom 13.35:
image

Today however I can only see the beach and canal at zoom 13.x and they have disappeared again at z14+:
image

Another browser’s incognito mode, QGIS and a separate Android tablet show pre-beach-edit tiles at zoom 14.

Additional Firefox weirdness

An additional layer of confusing for me is that the pnorman.github.io/tilekiln-shortbread-demo/ demo and the https://1ec5.github.io/tilekiln-shortbread-demo/ when viewed in Firefox seem to be showing me different cached versions of the same tile zoom 13 column 2374 row 3517 one without and one with the beach (respectively) even though they are both ostensibly the same file. I have deleted cookies and site data for both and then done a hard refresh with the cache disabled in the Network inspector and this persists. Neither site is showing the beach in a Chrome (or Microsoft Edge) incognito window so I think this bit is probably Firefox being weird and insisting on showing and old thing when it has been instructed to get it fresh.

Is there any reason why I would be getting tiles with old data having previously received tiles with newer data?