What is paging my psql

Hi guys.

I have virtually identical 3 servers and one is paging the
output.

-> $ psql --port=5437 -c '\pset pager'
Pager usage is off.

there is no PAGER nor any other, obvious OS evn var set, yet
I do simple query which shows a few lines, eg.
-> $ psql --port=5437 --dbname=upa_discourse -c 'select *
from pg_extension;'

and the output is paged, waiting for 'q' from user to go
back to shell.
I could not find any psqlrc neither - and the other two
servers do not that, to make more bizarre.
Would you know where is it coming from and how to fix it
permanently - ideally not by adding stuff but by figuring
out why it is the two servers do page and then fixing the
odd one same way.
I'm on Ubuntu 22.04 with ver 16 of PG.

thanks, L.