Buttler was the only England batsman to make it past 35, eventually being dismissed for a run-a-ball 57 to all but end the tourists' hopes of victory.
The umpires needed to intervene after Buttler was involved in a heated confrontation with a number of Bangladeshi players following their celebrations in close proximity to the dismissed skipper.
"I was just a little bit disappointed in the fashion they celebrated. Mainly just the way they celebrated by running towards me and giving me a bit of a send-off," he told reporters.
"You don't have to run up to a guy. I'm disappointed to get out, but emotions were running high, they were obviously delighted to get the wicket, maybe I should have just walked away."
England eventually slumped to a 34-run defeat as Bangladesh levelled the series at 1-1.