what is a bug ? i click collect after 5 min. but mu score does not updated

Update your clock, sync it with the time server, you are probably off by couple of seconds
and this is why your satoshis disappear.
I have had that problem too and after setting the system clock to update time it was all OK. After the claim the clock shows you some seconds, for example 00:07 and it should be 00:00 this means that your system clock is off with the current time by 7 seconds.