Pool has lost consensus after primary demotion

Build Info:
indy-node 1.3.51

Steps to Reproduce:
1. Install pool of 4 nodes.
2. Force view change by primary disconnecting (2nd node).
3. Write and read NYM.
4. Connect node back.
5. Force view change by primary demoting (3rd node).
6. Write and read NYM.

Actual Results:
Pool has lost write consensus in Step 5. Step 6 NYM is not written.

Expected Results:
Pool should have write\read consensus at n=3 f=0.

Additional Info:
Pool reaches consensus after all nodes' restart.