diff --git a/src/backend/catalog/pg_subscription.c b/src/backend/catalog/pg_subscription.c
index 0ff0982f7b..89fc6882be 100644
--- a/src/backend/catalog/pg_subscription.c
+++ b/src/backend/catalog/pg_subscription.c
@@ -47,6 +47,7 @@ GetSubscription(Oid subid, bool missing_ok)
 	Form_pg_subscription subform;
 	Datum		datum;
 	bool		isnull;
+	XLogRecPtr	skip_lsn;
 
 	tup = SearchSysCache1(SUBSCRIPTIONOID, ObjectIdGetDatum(subid));
 
@@ -72,6 +73,27 @@ GetSubscription(Oid subid, bool missing_ok)
 	sub->disableonerr = subform->subdisableonerr;
 	sub->skiplsn = subform->subskiplsn;
 
+	ereport(LOG,
+			(errmsg("GetSubscription(1) subform->subskiplsn %X/%X sub->skiplsn %X/%X",
+					LSN_FORMAT_ARGS(subform->subskiplsn),
+					LSN_FORMAT_ARGS(sub->skiplsn))));
+
+	/* Get skiplsn */
+	datum = SysCacheGetAttr(SUBSCRIPTIONOID,
+							tup,
+							Anum_pg_subscription_subskiplsn,
+							&isnull);
+	Assert(!isnull);
+	sub->skiplsn = DatumGetLSN(datum);
+
+	skip_lsn = subform->subskiplsn;
+
+	ereport(LOG,
+			(errmsg("GetSubscription(2) subform->subskiplsn %X/%X sub->skiplsn %X/%X, skip_lsn %X/%X",
+					LSN_FORMAT_ARGS(subform->subskiplsn),
+					LSN_FORMAT_ARGS(sub->skiplsn),
+					LSN_FORMAT_ARGS(skip_lsn))));
+
 	/* Get conninfo */
 	datum = SysCacheGetAttr(SUBSCRIPTIONOID,
 							tup,
diff --git a/src/backend/commands/subscriptioncmds.c b/src/backend/commands/subscriptioncmds.c
index 85dacbe93d..1398556455 100644
--- a/src/backend/commands/subscriptioncmds.c
+++ b/src/backend/commands/subscriptioncmds.c
@@ -1304,6 +1304,12 @@ AlterSubscription(ParseState *pstate, AlterSubscriptionStmt *stmt,
 		tup = heap_modify_tuple(tup, RelationGetDescr(rel), values, nulls,
 								replaces);
 
+		ereport(LOG,
+				(errmsg("AlterSubscription t_len %u sizeof(Subscription) %lu sizeof(FormData_pg_subscription) %lu",
+						tup->t_len,
+						sizeof(Subscription),
+						sizeof(FormData_pg_subscription))));
+
 		CatalogTupleUpdate(rel, &tup->t_self, tup);
 
 		heap_freetuple(tup);
diff --git a/src/backend/replication/logical/worker.c b/src/backend/replication/logical/worker.c
index f3868b3e1f..f7f77071c5 100644
--- a/src/backend/replication/logical/worker.c
+++ b/src/backend/replication/logical/worker.c
@@ -3898,7 +3898,13 @@ maybe_start_skipping_changes(XLogRecPtr finish_lsn)
 	 */
 	if (likely(XLogRecPtrIsInvalid(MySubscription->skiplsn) ||
 			   MySubscription->skiplsn != finish_lsn))
+	{
+		ereport(LOG,
+				(errmsg("not started skipping changes: my_skiplsn %X/%X finish_lsn %X/%X",
+						LSN_FORMAT_ARGS(MySubscription->skiplsn),
+						LSN_FORMAT_ARGS(finish_lsn))));
 		return;
+	}
 
 	/* Start skipping all changes of this transaction */
 	skip_xact_finish_lsn = finish_lsn;
@@ -3969,6 +3975,12 @@ clear_subscription_skip_lsn(XLogRecPtr finish_lsn)
 
 	subform = (Form_pg_subscription) GETSTRUCT(tup);
 
+	ereport(LOG,
+			(errmsg("clear subskiplsn %X/%X mysubskiplsn %X/%X finish_lsn %X/%X",
+					LSN_FORMAT_ARGS(subform->subskiplsn),
+					LSN_FORMAT_ARGS(myskiplsn),
+					LSN_FORMAT_ARGS(finish_lsn))));
+
 	/*
 	 * Clear the subskiplsn. If the user has already changed subskiplsn before
 	 * clearing it we don't update the catalog and the replication origin