Thanks for the heads up troops. i just tried rolling back to 7.3 but the issue was still there. Reinstalled 7.4 and the issue is still there. Definitely a weird one this…!
There was a kernel update 2 days ago too I think so, although I think it’s a long shot, I may try rolling back to the previous kernel just to see if that was the cause. Otherwise I don’t really know how to troubleshoot it, plus it’s not exactly life or death, so I’ll probably just embrace the quirk and try get on with things as normal.