Download the tool for free and launch it without installation after extraction
https://www.wagnardsoft.com/forums/viewtopic.php?t=1256

Select

Start ISLC minimzed and auto-Start monitoring.

Launch ISLC on user Logon.

for convenience

Hit Start to let it do it works and it will automatically effectively negate the effects of what you know as "memory leak". Keep the window open while you play/minimise only.



The default values are good as they are for Baldur's Gate 3 and any PC setup.