split tab processing.
this idea / anomaly concerns the main heart of the browser.
i don't know if it has ever happened to you, it has happened to me very often, even with different PCs with win10 and win11, never with win7 or older.
when i use the browser, with multiple tabs (taps) open, they block (freeze), if one goes into standby, as if they were connected even if the connection is working normally.
it happens to me when i download files or if a tab goes into standby for server-side login.
you could manage the various tabs separately, maybe in groups of pairs or three but not all together.
at the moment i solve it using 2 distinct browsers (duplicate)
i would add that an optimization of RAM consumption would be needed.