Brave tabs have to fully reload when left for some time

Why is Brave doing this ?
When I come back on a tab i left for some minutes I always see the tab reloading itself fully ! Why ? How to avoid this weird non-efficient stuff ? thanks

it might help you Is built-in 'tab suspension' (sleep/snooze/freeze/etc.) in the works?

this too Settings for tab sleeping / suspension - #2 by fanboynz

Thanks a lot. I checked and found that Brave is using so much memory on my notebook that it has to kill tabs ! I will need to use a more efficient browser, this one is a drainer like windows…