Inflated open and click rates

Hi everyone, 

I recently completed email warmup for a new client after shifting from CM Commerce to Klaviyo.

Part way through the warming up phase, our open and click rates suddently inflated from an average of 36% and 2% to as 60% and 8% respectively.

Obviously, these are false/bot clicks and opens as they happened within 2 minutes of sending the email.

I further analysed the data and 98% of the false opens and clicks are from Hotmail/Outlook. (Our SPF, DKIM, DMarc, etc are all properly set up.)

I know false opens and clicks are expected but this is way higher than the normal.

Does anyone have any suggestions to fix this issue?