diff --git a/server/src/rooms.test.ts b/server/src/rooms.test.ts
index 58cbd72..f175e2a 100644
--- a/server/src/rooms.test.ts
+++ b/server/src/rooms.test.ts
@@ -166,8 +166,13 @@ describe('a seat a browser lost', () => {
 		rooms.seen(room, bo, 'home');
 		const other = rooms.create('Bo', 3);
 		rooms.seen(other.room, other.token, 'home');
-		expect(rooms.findSeats('Bo', 'home', other.room.id).seated.map((s) => s.roomId)).toEqual([other.room.id]);
-		expect(rooms.findSeats('Bo', 'home').seated.map((s) => s.roomId).sort()).toEqual([other.room.id, room.id].sort());
+		const first = rooms.findSeats('Bo', 'home', other.room.id).seated;
+		expect(first.map((s) => s.roomId)).toEqual([other.room.id]);
+		// A seat given back is noted afresh from its next use; until then its old address claims nothing.
+		const second = rooms.findSeats('Bo', 'home').seated;
+		expect(second.map((s) => s.roomId)).toEqual([room.id]);
+		rooms.seen(other.room, first[0].token, 'home');
+		rooms.seen(room, second[0].token, 'home');
 		room.state!.over = { winner: 'A', reason: 'the test says so' };
 		expect(rooms.findSeats('Bo', 'home').seated.map((s) => s.roomId)).toEqual([other.room.id]);
 	});
diff --git a/server/src/rooms.ts b/server/src/rooms.ts
index c00bac2..bfdfc42 100644
--- a/server/src/rooms.ts
+++ b/server/src/rooms.ts
@@ -597,6 +597,8 @@ function apply(room: Room, line: LedgerLine): void {
 			const seat = room.seats.find((s) => s.id === line.id);
 			if (!seat) break;
 			seat.tokenHash = line.tokenHash;
+			// Whoever used the seat before has no claim on it by address now: the next use from the new device is noted afresh.
+			delete seat.addr;
 			seat.bot = false;
 			delete seat.standIn;
 			break;