Iframe won't load under inactive tab

[Black-Hole]

There is an iframe resource in the website. When I open the website, I immediately switch to another tab, then the iframe will not continue to load. Only when I activate the tab will he automatically load it.

I know this is an optimization, but I don't need this. There are no startup parameters to turn off this optimization.

I tried to open --enable-lazy-frame-loading and give the iframe a loading="eager" but it didn't work.

And expensive-background-timer-throttling, nor