Is there any possibility to delete all data directory of PostgreSQL by PgPool?

Recently I found that suddenly all data directories were deleted both primary and standby. I am assuming that it happens due to failover. Example: Suppose there are 4 nodes where 1 is primary and another 3 is standby. For example, suppose 1 and 2 at a time are Primary due to failover. Both primaries are somehow in active mode with the other two on standby. Is it possible by pgpool to delete all(4 nodes) data directories of PostgreSQL primary and standby? Need expert opinion.