Last chance salon here, probably a shot to nothing.

Isued MX850, MX905 and MRF250 perfectly for over a decade. A year or so ago I moved to the MX980. Ever since with several combinations of remote and base station (details below), I get the same problem.

The base station blinks to say it has got the signal OK, but does not send anything to the device. I have exhausted all other things (lots of posts here etc. expert uses, URC support), just wondered if anything else broadcast in the UK might be causing the issue ?

Thanks

Combinations tried
MX980 MRF 300
MX980i MRF 260i
MX980i MRF 350i
MX900i MRF 260i