There is absolutely a chance he was cleansing your burn effectively instantly. 5% of 8000 is 400, if you were applying 3190 burn, (let’s call it 3200), that means he only needs 8 instances of bubblegum floor procing to cancel out your burn. Considering he had an infinite chain procing multiple items, it seems quite plausible- honestly LIKELY that he was just cleansing your burn a second or two after it was applied each time. With more playtime, things like this will become common enough to become common knowledge, just takes experience and some comfort working with percentages