Does pragon cheese has been nerfed?

Trying spider 19 with following

paragon - low hp lead

2x lvl 60 max coldhearts

1x lvl 60 max zavia

1x lvl50 max stag knight

Some of spaiderlings targeting coldhearts istead of paragon, i thought that all spiderlinigs will attach champ with lower HP, or im doing something not right?