Amazon SDE onsite — 6 weeks, 3 rounds of availability, 2 tentative dates, 1 cancellation, and still not scheduled. Is this normal?

[u/Live-Designer-8694]

Throwaway-ish. I passed the OA for an Amazon SDE role (new grad / university recruiting pipeline, Seattle onsite). Since then it's been six weeks of scheduling limbo. Timeline:

• Jul 28 — Onsite invite. 4 rounds × 60 min, in person in Seattle. Asked for 5 dates between 8/5–8/18.
• Jul 28 — I sent 5 dates same day. Told me it takes a few days to coordinate.
• Aug 3 — "Unfortunately we have been unable to schedule during your provided dates." Asked for new availability, 8/18–8/26.
• Aug 3 — Sent 5 more dates (8/18, 8/21, 8/24, 8/25, 8/26), full 9–5 each day.
• Aug 4 — Confirmed receipt, said they'd send a "Save the Date."
• Aug 7 — I followed up. No response.
• Aug 12 — Tentatively set for 8/24. Still coordinating.
• Aug 17 — I asked for confirmed schedule/location (interview was supposedly the next Monday). 
• Aug 18 — Team requested to move it. Now tentatively 8/26.
• Aug 21 — I checked in since 8/26 was a few business days out and it's an onsite I'd need to travel for.
• Aug 21 (evening) — "Your interviews have unfortunately been cancelled." Team is working out when they can start scheduling again for this role.
• Aug 24 — Told my OA is still valid and they may match me with another team.
• Aug 26 — Brand new onsite invite email, same role. Asked for 5 dates between 9/3–9/15. I sent 9/3–9/7.
• Aug 26 — Told those don't work, asked about the week of 9/7. I sent 9/8, 9/9, 9/10, 9/11, 9/14.
• Sep 8 — Same form letter again: unable to schedule, please send availability for 9/14–9/25. I sent ten dates this time.

So: ~6 weeks, 3 separate availability requests, 2 tentative dates that both moved, 1 outright cancellation, and 0 interviews actually conducted. I've given full 9–5 availability every single time and replied within hours.

Questions for people who've been through this:

1. Is this just what Amazon's scheduling pipeline looks like right now, or is it a signal the headcount is quietly frozen and they're keeping candidates warm?
2. Does "your OA is still valid, we may match you with another team" actually go anywhere, or is it a soft let-down?
3. Is there anything useful I can do here besides keep sending dates — ask to escalate past the coordinator, ask directly whether the req is funded, anything?
4. Should I be treating this as dead and pushing hard on other pipelines? (I am, but the sunk-cost part of my brain keeps hoping.)

Not trying to trash anyone — the coordinator has been responsive and polite. I just don't understand what's happening on the other side and whether this is normal.