My Database getting dropped anonymously

I'm new the PostgreSQL.  I have setup my PostgreSQL instance in Azure cloud.

VM & OS         - Linux, Ubuntu 22.04, Size - Standard B2s (2 vcpus, 4 GiB memory)

PostgreSQL     -  psql (14.12 (Ubuntu 14.12-0ubuntu0.22.04.1))

Past few days, I'm seeing repeated instances of my Database getting dropped which is weird.

When I checked the logs in the /var/log/postgresql/postgresql-14-main.log, here is what it shows.

2024-06-20 23:17:20.030 UTC [91103] postgres@nectardev_db01 FATAL:  terminating connection due to administrator command
2024-06-20 23:17:20.031 UTC [91151] postgres@nectardev_db01 FATAL:  terminating connection due to administrator command
2024-06-20 23:17:20.041 UTC [91147] postgres@nectardev_db01 FATAL:  terminating connection due to administrator command
2024-06-20 23:17:20.061 UTC [91102] postgres@nectardev_db01 FATAL:  terminating connection due to administrator command
2024-06-20 23:17:20.061 UTC [91121] postgres@nectardev_db01 FATAL:  terminating connection due to administrator command
2024-06-20 23:17:20.072 UTC [91073] postgres@nectardev_db01 FATAL:  terminating connection due to administrator command
2024-06-20 23:17:20.081 UTC [91119] postgres@nectardev_db01 FATAL:  terminating connection due to administrator command
2024-06-20 23:17:20.312 UTC [90636] LOG:  background worker "logical replication launcher" (PID 90643) exited with exit code 1
2024-06-20 23:17:20.334 UTC [90638] LOG:  shutting down
2024-06-20 23:17:20.504 UTC [90636] LOG:  database system is shut down
2024-06-21 03:13:29.202 UTC [99847] LOG:  starting PostgreSQL 14.12 (Ubuntu 14.12-0ubuntu0.22.04.1) on x86_64-pc-linux-gnu, compiled by gcc (Ubuntu 11.4.0-1ubuntu1~22.04) 11.4.0, 64-bit
2024-06-21 03:13:29.202 UTC [99847] LOG:  listening on IPv4 address "0.0.0.0", port 5432
2024-06-21 03:13:29.202 UTC [99847] LOG:  listening on IPv6 address "::", port 5432
2024-06-21 03:13:29.231 UTC [99847] LOG:  listening on Unix socket "/var/run/postgresql/.s.PGSQL.5432"
2024-06-21 03:13:29.282 UTC [99848] LOG:  database system was shut down at 2024-06-20 23:17:20 UTC
2024-06-21 03:13:29.393 UTC [99847] LOG:  database system is ready to accept connections
2024-06-21 03:23:58.922 UTC [99987] nectar_dvpr@nectardev_db01 FATAL:  password authentication failed for user "nectar_dvpr"
2024-06-21 03:23:58.922 UTC [99987] nectar_dvpr@nectardev_db01 DETAIL:  Connection matched pg_hba.conf line 93: "host    all             all             0.0.0.0/0               md5"
2024-06-21 03:23:59.033 UTC [99988] nectar_dvpr@nectardev_db01 FATAL:  password authentication failed for user "nectar_dvpr"
2024-06-21 03:23:59.033 UTC [99988] nectar_dvpr@nectardev_db01 DETAIL:  Connection matched pg_hba.conf line 93: "host    all             all             0.0.0.0/0               md5"
2024-06-21 03:24:42.305 UTC [100002] postgres@template0 FATAL:  database "template0" is not currently accepting connections
2024-06-21 03:24:58.029 UTC [99996] nectar_dvpr@nectardev_db01 FATAL:  terminating connection due to administrator command
2024-06-21 03:25:00.673 UTC [100011] postgres@postgres ERROR:  cannot drop the currently open database
2024-06-21 03:25:00.673 UTC [100011] postgres@postgres STATEMENT:  DROP DATABASE postgres;
2024-06-21 03:25:08.314 UTC [100022] postgres@postgres ERROR:  database "nectardev_db01" is being accessed by other users
2024-06-21 03:25:08.314 UTC [100022] postgres@postgres DETAIL:  There is 1 other session using the database.
2024-06-21 03:25:08.314 UTC [100022] postgres@postgres STATEMENT:  DROP DATABASE nectardev_db01;
2024-06-21 03:26:35.111 UTC [100039] nectar_dvpr@nectardev_db01 ERROR:  relation "mas_party" does not exist at character 15
2024-06-21 03:26:35.111 UTC [100039] nectar_dvpr@nectardev_db01 STATEMENT:  select * from mas_party
2024-06-21 03:29:24.233 UTC [100087] postgres@nectardev_db01 ERROR:  relation "mas_party" does not exist at character 15
2024-06-21 03:29:24.233 UTC [100087] postgres@nectardev_db01 STATEMENT:  select * from mas_party;
2024-06-21 03:35:16.573 UTC [99847] LOG:  received fast shutdown request
2024-06-21 03:35:16.584 UTC [99847] LOG:  aborting any active transactions
2024-06-21 03:35:16.585 UTC [100053] postgres@nectardev_db01 FATAL:  terminating connection due to administrator command
2024-06-21 03:35:16.593 UTC [100047] postgres@postgres FATAL:  terminating connection due to administrator command
2024-06-21 03:35:16.603 UTC [100039] nectar_dvpr@nectardev_db01 FATAL:  terminating connection due to administrator command
2024-06-21 03:35:16.613 UTC [100010] nectar_dvpr@nectardev_db01 FATAL:  terminating connection due to administrator command
2024-06-21 03:35:16.654 UTC [99847] LOG:  background worker "logical replication launcher" (PID 99854) exited with exit code 1
2024-06-21 03:35:16.746 UTC [99849] LOG:  shutting down
2024-06-21 03:35:16.902 UTC [99847] LOG:  database system is shut down
2024-06-21 03:35:17.912 UTC [100172] LOG:  starting PostgreSQL 14.12 (Ubuntu 14.12-0ubuntu0.22.04.1) on x86_64-pc-linux-gnu, compiled by gcc (Ubuntu 11.4.0-1ubuntu1~22.04) 11.4.0, 64-bit
2024-06-21 03:35:17.912 UTC [100172] LOG:  listening on IPv4 address "0.0.0.0", port 5432
2024-06-21 03:35:17.912 UTC [100172] LOG:  listening on IPv6 address "::", port 5432
2024-06-21 03:35:17.932 UTC [100172] LOG:  listening on Unix socket "/var/run/postgresql/.s.PGSQL.5432"
2024-06-21 03:35:18.008 UTC [100173] LOG:  database system was shut down at 2024-06-21 03:35:16 UTC
2024-06-21 03:35:18.093 UTC [100172] LOG:  database system is ready to accept connections

I have not issued any database drop command.  I'm also using pgAdmin4 (8.6) in my windows desktop to work on Azure cloud database.  I tried to find solution through google but not found any answer why this is happening.  I'm at the verge of switching other databases if this issue not solved.  I request your help to solve this issue and would be grateful for that.

1) Database instance getting stopped after a period of time whereas I want the database to be always on.

2) Database is getting dropped (happened multiple times in the last one week).  This needs to be fixed.

Thank you

Sekar