Monster/mob spaweners NOT WORKING (view attachment)

Ever since upgrading to newest version of MCPE, NONE of the monster spawners work. I thought at first that it was one's i had already previously encountered, but I have come to find that it's ALL spawners including newly encountered spawners, and not one's that have been manually disabled. In the attachments you will see an inactive spawner I recently encountered in the Nether that I assume is for Blazes. As you can tell, they're dead, showing no flame animation nor a spinning monster inside. This was a real disappointment, because I need Blazes in order to acquire a Blaze Rods and the only place to get them is from spawners. Can you fix this, please? i hope so. Hope to hear from someone soon. Thanks for your time.