Question: what is nbss continuation message?
Answer: I can't say for certain, but, in this case, given the networking problems you're describing, "NBSS Continuation Message" probably means that the "previous segment" wasn't captured because it didn't make it to the machine running Wireshark, i.e. a packet got lost in transit between 192.168. 69.236 and 192.168. 69.245.