Hi
I've updated to WHDLoad 17.1 and that made no difference. I'm sure it's probably a setting in WinUAE as I vaguely recall changing something on an older version that worked.
I can't see any beta versions of WinUAE on there website (they mention WIP 2.7 but can't see any where to download it).
So I've tried v2.5, v2.6 and 2.6.1 and I'm going to try some older versions but nothing seems to work yet.
Image below (it actually looks worse than this in action but I hope you get the idea).