Unable to change ap ssid. AP locks up

I use uci to change the ssid, and then do uci commit.

From that point, i try to reinit wirless by running wifi, or wifi reload, or turning the iface down and then up.
No matter what I do, the AP no longer works. logread shows:

Wed Jul 17 21:48:13 2019 daemon.err hostapd: Using interface ra0 with hwaddr 00:0c:43:76:20:59 and ssid "tony45"
Wed Jul 17 21:48:13 2019 daemon.notice hostapd: ra0: interface state UNINITIALIZED->ENABLED
Wed Jul 17 21:48:13 2019 daemon.notice hostapd: ra0: AP-ENABLED
Wed Jul 17 21:48:13 2019 kern.info kernel: [  241.106823] IPv6: ADDRCONF(NETDEV_UP): apcli0: link is not ready
Wed Jul 17 21:48:13 2019 daemon.notice netifd: radio0 (7807): Successfully initialized wpa_supplicant
Wed Jul 17 21:48:13 2019 daemon.notice netifd: Interface 'wan' is enabled
Wed Jul 17 21:48:14 2019 daemon.info dnsmasq[6757]: read /etc/hosts - 4 addresses
Wed Jul 17 21:48:14 2019 daemon.info dnsmasq[6757]: read /tmp/hosts/odhcpd - 0 addresses
Wed Jul 17 21:48:14 2019 daemon.info dnsmasq[6757]: read /tmp/hosts/dhcp.cfg01411c - 2 addresses
Wed Jul 17 21:48:14 2019 daemon.info dnsmasq-dhcp[6757]: read /etc/ethers - 0 addresses
Wed Jul 17 21:48:19 2019 daemon.notice hostapd: handle_probe_req: send failed
Wed Jul 17 21:48:26 2019 daemon.notice hostapd: handle_probe_req: send failed

daemon.notice hostapd: handle_probe_req: send failed continues indefinitely.

I'm on a mt7620 using the 8.0.6 branch. If I reboot, the new ssid broadcasts fine.