ProFTPd server is constantly rebooting. (TLS/SSL)

Feb 04 12:02:18 raspberrypi proftpd[11971]: Starting ftp server: proftpd2021-02-04 12:02:18,065 raspberrypi proftpd[11978] 127.0.1.1: 127.0.1.1:21 masquerading as xx.xx.xx.xx

Feb 04 12:02:18 raspberrypi proftpd[11979]: 127.0.1.1 - ProFTPD 1.3.6 (stable) (built Tue Mar 10 2020 23:03:08 UTC) standalone mode STARTUP

Feb 04 12:02:18 raspberrypi proftpd[11971]: .

Feb 04 12:02:48 raspberrypi proftpd[11979]: 127.0.1.1 - ProFTPD killed (signal 15)

Feb 04 12:02:48 raspberrypi proftpd[11979]: 127.0.1.1 - ProFTPD 1.3.6 standalone mode SHUTDOWN

Feb 04 12:02:48 raspberrypi proftpd[12062]: Stopping ftp server: proftpd.

Feb 04 12:02:49 raspberrypi proftpd[12082]: Starting ftp server: proftpd2021-02-04 12:02:49,152 raspberrypi proftpd[12089] 127.0.1.1: 127.0.1.1:21 masquerading as xx.xx.xx.xx

Feb 04 12:02:49 raspberrypi proftpd[12090]: 127.0.1.1 - ProFTPD 1.3.6 (stable) (built Tue Mar 10 2020 23:03:08 UTC) standalone mode STARTUP

Feb 04 12:02:49 raspberrypi proftpd[12082]: .

Feb 04 12:03:19 raspberrypi proftpd[12090]: 127.0.1.1 - ProFTPD killed (signal 15)

Feb 04 12:03:19 raspberrypi proftpd[12090]: 127.0.1.1 - ProFTPD 1.3.6 standalone mode SHUTDOWN

Feb 04 12:03:19 raspberrypi proftpd[12186]: Stopping ftp server: proftpd.

Feb 04 12:03:20 raspberrypi proftpd[12204]: Starting ftp server: proftpd2021-02-04 12:03:20,169 raspberrypi proftpd[12211] 127.0.1.1: 127.0.1.1:21 masquerading as xx.xx.xx.xx

Feb 04 12:03:20 raspberrypi proftpd[12212]: 127.0.1.1 - ProFTPD 1.3.6 (stable) (built Tue Mar 10 2020 23:03:08 UTC) standalone mode STARTUP

Feb 04 12:03:20 raspberrypi proftpd[12204]: .

Feb 04 12:03:50 raspberrypi proftpd[12212]: 127.0.1.1 - ProFTPD killed (signal 15)

Feb 04 12:03:50 raspberrypi proftpd[12212]: 127.0.1.1 - ProFTPD 1.3.6 standalone mode SHUTDOWN

Feb 04 12:03:50 raspberrypi proftpd[12298]: Stopping ftp server: proftpd.