BBM groups calendar entries
 

I am a part of several groups on BBM, some personal, some work related. I expect to be leaving one group in the near future (due to a transfer between positions). I noticed that all of the calendar entries made by a user in the group calendar disappear when that user leaves the group. Is there a way to prevent this from happening??? Just because the individual user makes the entry, it does not mean that the event only relates to that one person!

Thanks!