For Shadowlands Season 4, Warcraft Logs will be experimenting with external buff caps, which will invalidate parses if the cap is exceeded.
External Buffs such as Power Infusion, Fae Guardians, Blessing of Summer, and Kindred Affinity have been controversial throughout the WoW community for a while and Warcraft Logs hosted not one, but three total polls on how to handle these in Dragonflight.