This happens to normal monsters who have ' of ' in their name and prefixed with 'a' or 'an' in the death message which causes them to match against summonRegex. A few examples would be sight of surrender, spark of destruction and the X of the cult family. A simple solution at a glance seems to be moving the get summon block inside TibiaDataParseKiller into the already existing if player conditional branch, and I don't believe this would affect deaths by summons of monsters since as far as I know they're always listed separately from their owner.