Cannot update from 0.91.4 to latest 0.92.2

trying to update to the latest version but update fails for no logged reason other than a timeout so reverts back to old version - any suggestions on how to proceed?

current version 0.91.4

hassio nuc version on ubuntu server 18.04

logged:

19-05-07 10:43:13 INFO (MainThread) [hassio.homeassistant] Update Home Assistant to version 0.92.2
19-05-07 10:43:13 INFO (SyncWorker_10) [hassio.docker.interface] Update image homeassistant/intel-nuc-homeassistant:0.91.4 to homeassistant/intel-nuc-homeassistant:0.92.2
19-05-07 10:43:13 INFO (SyncWorker_10) [hassio.docker.interface] Pull image homeassistant/intel-nuc-homeassistant tag 0.92.2.
19-05-07 10:44:28 INFO (SyncWorker_10) [hassio.docker.interface] Tag image homeassistant/intel-nuc-homeassistant with version 0.92.2 as latest
19-05-07 10:44:28 INFO (SyncWorker_10) [hassio.docker.interface] Stop homeassistant application
19-05-07 10:44:59 INFO (SyncWorker_10) [hassio.docker.interface] Clean homeassistant application
19-05-07 10:44:59 INFO (SyncWorker_10) [hassio.docker.interface] Cleanup images: ['homeassistant/intel-nuc-homeassistant:0.91.4']
19-05-07 10:45:00 INFO (SyncWorker_21) [hassio.docker.homeassistant] Start homeassistant homeassistant/intel-nuc-homeassistant with version 0.92.2
19-05-07 10:45:02 INFO (MainThread) [hassio.auth] Auth request from core_mosquitto for mqtt
19-05-07 10:45:02 ERROR (MainThread) [hassio.homeassistant] Error on call http://172.30.32.1:8123/api/: Cannot connect to host 172.30.32.1:8123 ssl:None [Connection refused]
19-05-07 10:45:02 INFO (MainThread) [hassio.auth] Home Assistant not running, check cache
19-05-07 10:45:02 INFO (MainThread) [hassio.auth] Cache hit for mqtt
19-05-07 10:55:02 WARNING (MainThread) [hassio.homeassistant] Don't wait anymore of Home Assistant startup!
19-05-07 10:55:02 CRITICAL (MainThread) [hassio.homeassistant] HomeAssistant update fails -> rollback!
19-05-07 10:55:02 INFO (MainThread) [hassio.homeassistant] Update Home Assistant to version 0.91.4
19-05-07 10:55:02 INFO (SyncWorker_30) [hassio.docker.interface] Update image homeassistant/intel-nuc-homeassistant:0.92.2 to homeassistant/intel-nuc-homeassistant:0.91.4
19-05-07 10:55:02 INFO (SyncWorker_30) [hassio.docker.interface] Pull image homeassistant/intel-nuc-homeassistant tag 0.91.4.
19-05-07 10:56:19 INFO (SyncWorker_30) [hassio.docker.interface] Tag image homeassistant/intel-nuc-homeassistant with version 0.91.4 as latest
19-05-07 10:56:19 INFO (SyncWorker_30) [hassio.docker.interface] Stop homeassistant application
19-05-07 10:56:20 INFO (SyncWorker_30) [hassio.docker.interface] Clean homeassistant application
19-05-07 10:56:20 INFO (SyncWorker_30) [hassio.docker.interface] Cleanup images: ['homeassistant/intel-nuc-homeassistant:0.92.2']
19-05-07 10:56:21 INFO (SyncWorker_9) [hassio.docker.homeassistant] Start homeassistant homeassistant/intel-nuc-homeassistant with version 0.91.4
19-05-07 10:56:23 INFO (MainThread) [hassio.auth] Auth request from core_mosquitto for mqtt
19-05-07 10:56:23 ERROR (MainThread) [hassio.homeassistant] Error on call http://172.30.32.1:8123/api/: Cannot connect to host 172.30.32.1:8123 ssl:None [Connection refused]
19-05-07 10:56:23 INFO (MainThread) [hassio.auth] Home Assistant not running, check cache
19-05-07 10:56:23 INFO (MainThread) [hassio.auth] Cache hit for mqtt
19-05-07 10:56:56 INFO (MainThread) [hassio.homeassistant] Detect a running Home Assistant instance
19-05-07 10:56:56 INFO (MainThread) [hassio.homeassistant] Successful run Home Assistant 0.91.4

I would try temporarily disabling mqtt & upgrading again.