I have just tried to cash out for miserly 90p and confirmed it all for a rebuff after Luke Humphries won a leg. I confirmed this when the offer was there. A bit pissed off as I don't have leg to stand on. I'm glad it wasn't for 90 k as would have lost 12k while you were waiting for the for leg to be decided. 90pence is hardly worth this effort of complaint but this has bugged me.
I missed out on a cashout during the darts too. Even told me 'Processing' after i confirmed. Then something changed in the match and i got booted out of it. When sports are rapidly evolving it can be difficult to cash out when you want.