different content of pg_depend after pg_upgrade

Hi

We checked some check query based on some operations on pg_depend table.
This query did different result when database was migrated with pg_dump or
with pg_upgrade. I found so this query was broken, but I found interesting
thing.

The count is 1 for any objid

select distinct count(distinct classid), objid from pg_depend group by
objid;

when system was loaded from dump

but when we used pg_upgrade, then previous rule was invalid.

Is it expected behave?

Regards

Pavel