Lights flickering, outlets randomly stop working
It's not normal, and you probably have loose connections somewhere. As usual in my experience, &quot;Home insurance&quot; looks like a scam that does not solve anything. Send incompetent who sees nothing wrong, laugh all the way to the bank. Won't pay for a competent serviceman, they have their own special people who are selectively blind.
If (as Jack asks in his comment) the Kitchen outlets are on a double breaker (Multiwire Branch Circuit or MWBC - very common USA/Canada for the required two 120V 20A circuits in a kitchen) that will support 4800W - I would question whether your &quot;6000W&quot; worth of appliances was actually drawing 6000W, or merely &quot;nameplate rated&quot; for that much total.
There's often quite a difference between maximum draw and actual draw at a given time.