Node is broken after adding it to pool

Build Info:
indy-node 1.2.206

Steps to Reproduce:
1. Start pool of 4 nodes.
2. Force 4 view changes (so new primary is the 1st node again).
3. Add the 5th node.
4. Send some NYMs.
5. Force 4 view changes (so new primary is the 5st node).
6. Add the 6th node.
7. Check ledger and log on the 6th node.

Actual Results:
The 6th node isn't catched up with other 5 nodes.
There is a trace log in `systemctl status indy-node` and in journalctl.

Expected Result:
The 6th node should work the same as the 5th node after adding.