ElegantOTA and WebThings (Arduino) + ESP32-S3

[NinoBenci]

Hopefully someone can point me to a solution, am I missing something?

I'm trying to integrate ElegantOTA to an existing WebThings (Arduino) app which currently runs on an XIAO ESP32-S3.
The WebThings app compiles and runs with no errors, and have been in service for a few weeks now.
Adding ElegantOTA (ESPAsyncWebServer is setup as default) into the existing code base breaks the functionality in two ways...
If the ElegantOTA server is configured after the WebThings server, ElegantOTA does not respond BUT the WebThings server functions as expected. If ElegantOTA server is configured prior to WebThings being initialised, then WebThings fails to respond.
The code compiles with no errors, Using Arduino IDE 2.3.2. The core WebThings code is based on the Arduino examples provided, with changes as required, and has been running without fail for several weeks.
The ElegantOTA example used as a reference is AsyncDemo.ino. No errors during compilation.

If you would like to review the code, please request, as it is long.

Regards.