Time Machine not advertised after unlocking dataset until SMB is manually restarted

SMB shares pointing to password-encrypted datasets are not visible for use by Time Machine after they are unlocked until SMB is manually restarted.

Steps to reproduce:

1. Set up a password encrypted dataset

2. Create a Time Machine share on the encrypted dataset

3. Reboot TrueNAS

4. Unlock the dataset

5. On a Mac, notice the share isn't visible to Time Machine, and that TrueNAS doesn't advertise _smb._tcp over mDNS

6. Stop and start the SMB service on TrueNAS

7. On a Mac, notice that the share is now visible to Time Machine, and that TrueNAS advertises _smb._tcp over mDNS

With legacy GELI encryption, unlocking a pool would restart services including SMB automatically. Perhaps something like that isn't happening with the new native encryption implementation.

The attached debug is from a test VM I set up just to make sure I could reproduce this issue.