i was at the casino after winning 300k on poker, i bet a few thousand on roulette then went to play keno. after a couple of rounds it said “you need 69,400 to do this” and when i rebooted i was down to 10k units. i was gonna use them to finish my condo 
I’ve refunded the lost units.
unfortunately it happened again. definitely a bug with keno. only lost 150k this time but still a shame. will avoid the machines in future until its fixed.