poison applied by spider skill like Poison Gas lose its effect after pet swap despite poison debuff don’t disappear. I’ve tested it and poison damage don’t go on after swapping. Don’t know if at least 33% healing reduction persist. Also if pet aplly poison, your own poison damage only start after pet damage end. This could be a problem in poison master build where poison damage from weapon skills hit a lot more than pet poison.
Plus: if pet apply poison and u apply poison after pet and thean u switch it. Pet poison don’t work and your poison only start its thick after pet poison end (also when pet poison don’t work).