windows – Boost ASIO crashes while calling callback function

I am new to boost library. I have written a server using boost beast async methods, but sometimes it got crashed. The scenario is not common, sometime it will take 3-4 hr to get crashed. I am sharing the screenshot of crash point which I got from application crashed dump file.

Please help me to find the reason of the crash.

enter image description here

I have done some research on google and also check this link “https://www.boost.org/doc/libs/1_54_0/boost/asio/detail/deadline_timer_service.hpp” but not able to understand it.