Radiator turns itself off

Our living room radiator seems to shut itself off after a while when the other radiators are still heating. It has a TRV, which is turned to maximum.

I find that to get it started again, I have to turn the TRV off, then back on to full and also the boiler off and then back on.

Is there a problem with the TRV? It seems to be only this radiator in the house that is behaving strangely.