How far are you from the utility service point? Overhead or ug strike? I had problems similar- with stove starting up or furnace.. some 1959s wiring and done later 80s additions. We had a total rewire and new panel installed. Turns out we had a ton of stuff on 1 circuit, probably a fire hazard. I’d check out exactly what’s on that same circuit just in case.. but generally (as a service engineer for a utility) If you’re in a residential neighborhood and within a span of your transformer or closer I highly doubt you’re getting voltage drop at your termination point over 3%. You can check it easily get one of those plug in deals to see what voltage you’re getting at outlets