Has the load custom tle option been removed? I don't see it in the menu.

You: load custom tle
Bot: I don't have the capability to load custom TLEs directly. If you need assistance with something else or have a different request, feel free to let me know!
You: load tle file
Bot: I don't have the capability to load TLE files directly. If you have a specific TLE you want to use, please provide the details, and I can assist you with other related tasks.

That was a debugging thing I'd left in by accident - for specifying a custom TLE source at build time.

You can load any TLE with file/import or drag and drop.

If you drop in a new TLE file it will (currently) replace what is in there. If you'd clicked "Custom TLE" it woudl have tried to load my test URL
CUSTOM_TLE="https://celestrak.org/NORAD/elements/supplemental/sup-gp.php?FILE=starlink&FORMAT=tle?FAKEDATE={YYYY}-{MM}-{DD}"

Which would have just loaded the current Starlink satellites - this often contains satellite trains that are NOT in the "Load LEO for Date" as space-track historical data often is a few days behind, so will almost always miss very recent trains (i.e. recently launched Starlink sets). This would have been the same as clicking "Load CURRENT Starlink".

But now the "Load LEO" seems to be excluding those satellites from the historical data. This is probably because they don't yet have stable orbits, and so are being filtered out. This is a problem.
Starlink 36214 should be there, but it's not. But if I go to a more recent date it it's in the space-track data (presumably because its now in a stable orbit, assuming that's the reason it was missing earlier)

This needs investigating

There also seems to be another issue going between TLEs and back to one previously loaded, saying:

External Quote:

Which I'm just noting here so I fix it later.