diff --git a/lib/blob/blobstore.c b/lib/blob/blobstore.c
index 0278eab80..d7e3bbb03 100644
--- a/lib/blob/blobstore.c
+++ b/lib/blob/blobstore.c
@@ -2612,8 +2612,6 @@ blob_request_submit_op_single(struct spdk_io_channel *_ch, struct spdk_blob *blo
 	cpl.u.blob_basic.cb_fn = cb_fn;
 	cpl.u.blob_basic.cb_arg = cb_arg;
 
-	is_allocated = blob_calculate_lba_and_lba_count(blob, offset, length, &lba, &lba_count);
-
 	if (blob->frozen_refcnt) {
 		/* This blob I/O is frozen */
 		spdk_bs_user_op_t *op;
@@ -2630,6 +2628,8 @@ blob_request_submit_op_single(struct spdk_io_channel *_ch, struct spdk_blob *blo
 		return;
 	}
 
+	is_allocated = blob_calculate_lba_and_lba_count(blob, offset, length, &lba, &lba_count);
+
 	switch (op_type) {
 	case SPDK_BLOB_READ: {
 		spdk_bs_batch_t *batch;
diff --git a/test/unit/lib/blob/blob.c/blob_ut.c b/test/unit/lib/blob/blob.c/blob_ut.c
index a63031bac..1494de29c 100644
--- a/test/unit/lib/blob/blob.c/blob_ut.c
+++ b/test/unit/lib/blob/blob.c/blob_ut.c
@@ -821,7 +821,7 @@ blob_snapshot_freeze_io(void)
 	/* This is implementation specific.
 	 * Flag 'frozen_io' is set in _spdk_bs_snapshot_freeze_cpl callback.
 	 * Four async I/O operations happen before that. */
-	poll_thread_times(0, 3);
+	poll_thread_times(0, 4);
 
 	CU_ASSERT(TAILQ_EMPTY(&bs_channel->queued_io));
 
@@ -833,9 +833,8 @@ blob_snapshot_freeze_io(void)
 
 	/* Verify that I/O is queued */
 	CU_ASSERT(!TAILQ_EMPTY(&bs_channel->queued_io));
-	/* Verify that payload is not written to disk */
-	CU_ASSERT(memcmp(payload_zero, &g_dev_buffer[blob->active.clusters[0]*SPDK_BS_PAGE_SIZE],
-			 SPDK_BS_PAGE_SIZE) == 0);
+	/* Verify that payload is not written to disk, at this point the blobs already switched */
+	CU_ASSERT(blob->active.clusters[0] == 0);
 
 	/* Finish all operations including spdk_bs_create_snapshot */
 	poll_threads();