Why can I no longer access UHD content on my Panasonic TV?

Connected TV | Update

*** Wednesday 18 February ***

We are aware that some Panasonic devices can no longer access Ultra HD content on BBC iPlayer. This is affecting the panasonic-tv_2021_t32_fvp range. The list of models in the range can be found below.

Unfortunately, this issue can't be resolved. This means that UHD content will no longer be available on the affected models. All UHD content will be available in HD on these devices.

The models impacted are:

TX-65JX800B
TX-58JX800B
TX-50JX800B
TX-40JX800B
TX-65JX800BZ
TX-58JX800BZ
TX-50JX800BZ
TX-40JX800BZ