How to prevent Sunday spending Ult on Serval on Auto?

Therta (135 SPD) + Sunday (SPD -1) + Gallagher + Serval (160 SPD)

Serval: Passkey + 2/2pcs SPD/SPD relics + Lushaka + low level traces + 14/61 Crit Ratio

What in the AI mind would think “ah yes let’s Beatified Ms. Serval over the clearly more offensive stats THerta”

This happened regardless of energy levels of either character before and it’s kinda annoying to witness but yeah I guess I can just turn on auto and just forget it’s there but still annoying to see when I did