Macbook battery rapid drain

My battery rapidly drains while in sleep mode and Apple cannot identify the issue. When i say drain i mean it falls off a cliff and goes from 100% to 0% in minutes. This doesn't happen everyday but does a few times a week.

Apple has looked at the battery health and said that is not the issue. FYI, have taken it into Apple Shop twice and had online help a few times and have given up with Apple as they cannot identify the problem. The only thing they said could be a problem was Chrome or One Drive were the issue, however still occurs even when I have quite both.

Does anyone have an idea what is happening?

I am really hesitant to upgrade (current is 2021) in case the issue is not with the MacBook but how it is set up, but i cant see anything wrong.