https://github.com/EQEmu/Server/blob.../bot.cpp#L3880
It's still too vague to determine what the actual cause is.
Group is taken from the bot owner - who should be leader in that case.
And the code that follows can only be accessed if the conditions that appear to lead to the crash are true. (The access of 'g->GetLeader()->GetID()' would crash if 'g' or
'GetLeader()' were nullptr..but, they're not. They could have been recently deleted..but, that type of diagnosis requires a hands-on testing.)