Just adding on to a nice response from abronan, our internal protocol also does some optimizations when it comes to leader election, e.g. Pre Vote protocol (https://github.com/eBay/NuRaft/blob/master/docs/prevote_prot...)

Also, we apply many different faults in our Jepsen tests which are run 3 times a day and we never had a problem with leader election. I know this doesn't confirm that there is no bug in it but it's pretty reassuring I would say.