No Sky Sports 2, 3 and 4???



I have recently bought my first Zgemma H2S and installed Wooshbuild v5. I got a 48 hour gift line of a guy on the forum. Initially all channels worked fine but now Sky Sports 2, 3 and 4 four have stopped working. All I get on these three channels is a black screen with no audio. Every other FTA and SKY channels work? Has anyone had a similar issue and can anyone suggest a fix?

I have checked the signak strength and both tuners are at 82% 16.2db, BER=0.