bug: OAuth fails to complete

Working on one of my own projects, and I keep hitting OAuth errors on the roundtrip back from the PDS. i t works fine on every other PDS I test, It's just tranquil. Attached are redacted server and OAuth logs.

OAuth logs: https://tangled.org/strings/did:plc:h3wpawnrlptr4534chevddo6/3mkjylo2ulm22 Tranquil Logs: https://tangled.org/strings/chaosgreml.in/3mkjyo6hrj522

Let me know if you need anything else! :-)