ST devices “not supported” in HK
## Verify the following before opening an trouble issue

**Go over all the following points, and put an `x` in all the boxes that apply.
If you're unsure about any of these, don't hesitate to ask. We're here to help!**

-  [X ] That _OAuth_ is Enabled for the SmartApp under the IDE.
-  [X ] The SmartApp and Device Handler are using the latest code available.
-  [X ] That Both the SmartApps and Device Handlers have been _Published for You_ in the IDE.

---
## About Your Setup
-  How many devices are detected?: few
-  Mobile App Version(Not required):
-  SmartApp Version: 2.3.3
-  Device Handler Version: 1.0.0213a
-  Homebridge Version: HOOBS 3.2.6
-  NodeJS Version: ?

## Expected Behavior
Previously had ~35 devices in ST working fine in HK.

## Current Behavior

Reinstalled fresh - ST plugin and HK are talking, as some devices show up and work fine, but many show up then fail within minutes. They disappear from HK only to show up later as “not supported”. (No new gear - same devices that used to work fine.) Sometimes removing/reinstalling solves it, sometimes not. Sometimes installing under a different device category solves it, sometimes not.

## Steps to Reproduce (for bugs)
Example: add ST motion sensor in smartapp plugin. Within a few seconds, it shows up in HK. Sometimes it works, sometimes it just disappears from HK only to show up moments later as “not supported”.

## Context
**How has this issue affected you? What are you trying to accomplish?
**Providing context helps us come up with a solution that is most useful in the real world**

Apologies if I’m in the wrong place with this. Please just let me know. I’m not conversant with code and some of the procedures necessary to install/configure some of these things. Just doing the best I can with whatever documentation I can find. Your Community Installer (which I used in the install) is a great help for people like me - thank you!
---
Please include a copy of any relevant log output to assist in tracking down the bug
