Degraded RAID-50 container won't rebuild, even with dedicated hot spare

I have an R730 with a PERC H730 Mini and 16 drives.
14 of the drives are configured as a RAID-50 container and the last two drives are configured as global hot spares.
One of the drives showed an error condition, as did the container, so I replaced the drive and assigned it as a global hot spare.

The container still shows as degraded, and there's no sign that the container is using either hot spare to rebuild.
Now I have another drive showing as having a problem, and I don't know if I can replace it, since the container still shows as degraded and neither global spare is being put to use.
I even tried changing one of the hot spares to dedicated, which should be unnecessary with only one virtual disk.
That didn't change anything.

Any recommendations?