I had setup the private network of 3/3 validators with 3 nodes(one node for one validator), after that I connected the fourth node to that private network and added the fourth validtor which goes in waiting state. After the completion of era I had increased the validator count, now my validator count is 4/4 everything is working fine. Now, the issue is when I added more validators on fourth node and increase the validator count and make the network of 7/7 validtators, my block generation time is increased and block finalization is stopped.
But if i am applying the process of one node for one validator and make the network of 7/7 validators everything is working fine. Now I want to know that why this issue occurs when I added multiple validators from a single node.