I recently forced one of these out for the jackpot repeat, that was fine.
But when i was leaving it i had about 50p of credit and knocked down the stake to 10p. Strangely on the next spin i think, it put me on £1.50 cash, but i hadnt achevied a win. In fact it wasnt actually a normal feature in that all 3 columns were not open to hi-lo on, just the cash.
Never saw anything like this happen but to be fair i havnt had a great deal of play on them. Obviously it was some kind of glitch, perhaps an empty .