Spider Matriarch doesnt always spawn spiders

It seems like if you use Spider Matriarch as a spectre (the one you get from a corpse you buy) then it will only spawn spiders if 1 of 2 conditions is fulfilled:
1) The small spiders are currently on screen with you
2) Small spiders dont exist

If you run through an area and small spiders get left behind, they will exist forever and block any new spawning of spiders

Of course this is just my assumption, maybe the bug is something else

Trying out the spiders, this is so annoying the spiders indeed dont summon little spiders if the little ones stay behind and they dont get convocated so theres no way to keep them other than going slow and micromanaging their position...