A remote unit's move was seated by the frame's movement pass, so a listener between two packets read where the unit stood before. 1.12.1 seats a move inside its packet when the movement clock has it due (`0x618dd2`), and holds it for the tick when not.
**Changed**
- A due move seats in its handler, stepped on by its lateness (`0x618bb0`). A rider seats on any game object flagged as a transport (`0x630a80`).
- A create seeds the unit's relay chain with its stamp (`0x619320`). On vmangos, a player who stood still before coming into view now trails by up to a second, as in 1.12.1.
- A plain relay ends its packet; only the speed relays read on (`0x6010e0`).
- `GetBattlefieldPosition` and `SpellCanTargetUnit` read positions at the call.
**Tests:** due and held moves, the catch-up, riders, the create seed, each read between packets. Each fails on main.
Part of #2217.
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Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Sam Sung
c2f65546f9