Have you maybe changed order of sensors? If that's the case, try to click "Restore Original Order" in the Layout tab of Sensor config.
Or do you have a multi-GPU system?
Please provide more information, like screenshots, etc.
"GPU Memory allocated" was never reported for AMD GPUs by HWiNFO. Only D3D memory usage is reported.
It is possible to report "GPU Memory Utilization" for some AMD GPUs, but not for yours.
Are you sure those values were really reported before ?
I believe the "GPU Mem" you renamed was actually the "GPU D3D Memory Dedicated" value, which is still present. It's name was just somehow lost.
There is (and never was) no other GPU Memory allocated value for AMD GPUs reported.
As for GPU Power, this is hard to say when I don't know more details which exact sensor that was.