Kong api gateway stalls even if PG_RO_HOST is still up

Hi, I have setup a postgres database with a read replica; I configured the PG_RO_HOST to point to the read replica.

Unfortunately, when I stop the master, the kong api gateway is no longer processing requests even though the read replicate server is still operational.

Is this working as designed? I was hoping the kong api gateway would be able to continue to operate without the primary database in a slightly degraded mode.