--- a/src/backend/storage/aio/aio.c
+++ b/src/backend/storage/aio/aio.c
@@ -578,6 +578,20 @@ pgaio_io_wait(PgAioHandle *ioh, uint64 ref_generation)
         PgAioHandleState state;
         bool            am_owner;

+int inistate = ioh->state;
+if (inistate == PGAIO_HS_IDLE)
+{
+  fprintf(stderr, "!!!pgaio_io_wait[%d]| initial ioh->state: %d\n", getpid(), inistate);
+}
+for (int i = 0; i < 10; i++)
+{
+  int curstate = ioh->state;
+  if (curstate != inistate)
+  {
+    elog(PANIC, "!!!pgaio_io_wait| ioh->state changed from %d to %d at iteration %d", inistate, curstate, i);
+    break;
+  }
+}
         am_owner = ioh->owner_procno == MyProcNumber;

         if (pgaio_io_was_recycled(ioh, ref_generation, &state))
@@ -599,6 +613,10 @@ pgaio_io_wait(PgAioHandle *ioh, uint64 ref_generation)
         {
                 if (pgaio_io_was_recycled(ioh, ref_generation, &state))
                         return;
+if (ioh->state == PGAIO_HS_IDLE)
+{
+  fprintf(stderr, "!!!pgaio_io_wait[%d]| ioh->state: %d (initial state: %d)\n", getpid(), ioh->state, inistate);
+}

                 switch ((PgAioHandleState) state)
                 {