GS-WDS07 interference?

Hi guys, Was wondering whether anyone else has had the same issue.

I’m using an ESP32 based OMG Gateway and a GS-WDS07 sensor with home assistant.

I find that my GS-WDS07 simply does not work when mounted to my porch metal door. The porch is brick with glass windows and the porch door is a metal sliding door with paned glass throughout. also the main house door is metal.

I take it this is my issue? My gateway is literally only about 5m away from my sensor during testing. Does anyone have any experience of working round this? Or should i simply be using for a different sensor? Would prefer to use what i have if possible.