Several HA instances?

Checked ps aux --sort -rss and got:
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
homeass+ 11431 0.3 10.0 152420 95116 ? Ssl Apr26 5:40 /srv/homeassistant/bin/python3 /srv/homeassistant/bin/hass
homeass+ 30310 4.6 9.3 324260 88372 ? Ssl 19:22 4:07 /srv/homeassistant/bin/python3 /srv/homeassistant/bin/hass
homeass+ 27820 1.4 8.1 133492 77720 ? Ssl 18:37 1:56 /srv/homeassistant/bin/python3 /srv/homeassistant/bin/hass
homeass+ 2712 2.5 6.5 120340 62600 ? Ssl Apr12 542:27 /srv/homeassistant/bin/python3 /srv/homeassistant/bin/hass
homeass+ 459 0.5 6.3 115620 60140 ? Ssl Apr26 12:32 /srv/homeassistant/bin/python3 /srv/homeassistant/bin/hass
homeass+ 550 0.0 5.5 110192 52276 ? Ssl Apr12 0:24 /srv/homeassistant/bin/python3 /srv/homeassistant/bin/hass

Instances popping up with every systemctl stop/start hass? Should I reconsider some of my routines…? Memory consumption in pi also raised from 30% to 60% level.
Is it

Looks like that there is something wrong with your Home Assistant systemd unit file.