Issues with MQTT after firmware update v2.1.6

Anyone running into issues with MQTT on Shelly Motion after firmware update to 2.1.6? It just stops working entirely for me. I tried re-entering MQTT credentials and nothing. No authentication issues or anything from an MQTT perspective. Downgrading to 2.0.5 allows everything to start functioning again.

EDIT: I did a bit more testing and my device goes unresponsive when attempting to change the MQTT server address from the current fqdn:port to ip_address:port.

Zitat

How did you downgrade?

Grab the firmware from here: https://smarthome-forum.eu/index.php?shelly-firmware-archive/. Then you just need to use curl or something with your credentials to push the update to your device. Here's an example with httpie. You just need to set your variables for USER/PASS/ADDR respective of your setup.

$ http --auth $USER:$PASS http://$ADDR/ota\?url\=http://archive.smarthome-forum.eu/v2.0.5/SHMOS-01_build.zip
HTTP/1.0 200 OK
Content-Type: application/json
Server: lwIP/2.1.2 (http://savannah.nongnu.org/projects/lwip)

{
    "has_update": false,
    "new_version": null,
    "old_version": "20220613-073803/v2.1.6@166b8318",
    "status": "updating"
}

Appreciate it.