LocalTuya Air Filter no longer responding

I’ve had my SmartMi Air Purifier setup through LocalTuya for a few month now using these instructions:
https://community.home-assistant.io/t/add-smartmi-air-purifier-to-integrations/344858/16

It has been working great, except lately I can only see the state of the filter. Changing speed, timer, on/off does nothing. If I use the Tuya iPhone app or the buttons on the unit itself, I can see the state change in Home Assistant. But I can’t push any settings to the filter. Anyone else have this problem suddenly? Any ideas how to troubleshoot?

Thanks!