Learn Editor: Update storage-task-known-issues.md

Author: sshankMSFT

articles/storage-actions/storage-tasks/storage-task-known-issues.md

@@ -119,6 +119,11 @@ The workaround is to exclude the specific prefixes which are soft deleted.
 
 When rehydrating archived blobs, there's no option to choose a priority. The blobs are rehydrated with the standard priority. 
 
+## Delay in Task Assignment Runs
+
+Task assignment runs can take around 20 minutes to change status to In Progress after being queued. Until then, no updates will be shown. This delay is expected behavior and there is no workaround for immediate updates.
+
+
 ## See Also
 
 - [Azure Storage Actions overview](../overview.md)