fix_issue2.txt

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diff --git a/src/backend/utils/activity/pgstat_replslot.c b/src/backend/utils/activity/pgstat_replslot.c
index 895940f4eb9..e4dbbf4f405 100644
--- a/src/backend/utils/activity/pgstat_replslot.c
+++ b/src/backend/utils/activity/pgstat_replslot.c
@@ -80,12 +80,17 @@ pgstat_report_replslot(ReplicationSlot *slot, const PgStat_StatReplSlotEntry *re
 	PgStat_EntryRef *entry_ref;
 	PgStatShared_ReplSlot *shstatent;
 	PgStat_StatReplSlotEntry *statent;
+	bool previous_had_stats;
+	bool current_has_stats;
 
 	entry_ref = pgstat_get_entry_ref_locked(PGSTAT_KIND_REPLSLOT, InvalidOid,
 											ReplicationSlotIndex(slot), false);
 	shstatent = (PgStatShared_ReplSlot *) entry_ref->shared_stats;
 	statent = &shstatent->stats;
 
+	previous_had_stats = statent->plugin_has_stats;
+	current_has_stats = repSlotStat->plugin_has_stats;
+
 	/* Update the replication slot statistics */
 #define REPLSLOT_ACC(fld) statent->fld += repSlotStat->fld
 	REPLSLOT_ACC(spill_txns);
@@ -97,7 +102,15 @@ pgstat_report_replslot(ReplicationSlot *slot, const PgStat_StatReplSlotEntry *re
 	REPLSLOT_ACC(total_wal_txns);
 	REPLSLOT_ACC(total_wal_bytes);
 	statent->plugin_has_stats = repSlotStat->plugin_has_stats;
-	if (repSlotStat->plugin_has_stats)
+
+	/* Plugin no longer supports stats, reset counters */
+	if (previous_had_stats && !current_has_stats) {
+		statent->plugin_sent_txns = 0;
+		statent->plugin_sent_bytes = 0;
+		statent->plugin_filtered_bytes = 0;
+	}
+
+	if (current_has_stats)
 	{
 		REPLSLOT_ACC(plugin_sent_txns);
 		REPLSLOT_ACC(plugin_sent_bytes);