often enough it will remove your tyrant and replace it with the new set of dogs and I think this is because of the totem/pet limit, also maybe this has something to do with our tier set being an extra pet because I don’t remember this happening last tier
I could not replicate it.
I got in total 5 dogs (including the tier set dog) and the tyrant stood still there.
If you really want to report a bug you have to give clear instructions as to how to replicate it and then actually report it via the ingame support meny.