In Ranked Champ Select and everyone disconnects?

Duoing with a friend and both of us are on Discord. Its my turn to ban a champ and all of a sudden a popup comes up saying there is trouble with the connection, and i see in the chat that everyone disconnected. My friend says the same thing happened to him. I missed the time for banning and lost 4 lp and got put on delayed queue. I don't really need compensation or anything, I just hope this isn't a reoccurring problem. This would be particularly distressful for people in their promos. There didn't appear to be any specific cause.