Consul leadership selection in cluster when consul servers are down

#### Overview of the Issue

When in cluster of 3 Consul servers 2 servers are down and then 1 goes up (so we have 2 Servers Up), they are not able to select leader of cluster.
It worked well in 1.4.4 but when we tried to verify this scenario in 1.7.1 it failed.

#### Reproduction Steps
Cluster of 3 consul servers (also -bootstrap-expect = 3).

Lets say we have Servers: A (Leader), B , C

Stop A --> Servers: B(Leader), C
Stop B --> Servers C
Start A --> Servers A,C

These 2 servers didn’t succeed to select leader of the cluster back , since B was last leader and it is down.

In the case that 3) Start B --> Servers B,C and B keeps to be leader.

### Operating system and Environment details

Windows. Consul 1.7.1

Is this behavior valid? Should they able to select leader of the cluster in the case of 2 from 3 servers are up?