How to avoid suspended apps getting killed in iOS 14?

I have updated my iPad operating system from iOS 11.4 to iPadOS 14.3. Unfortunately, suspended apps are now immediately killed in the background while in the older version I could keep many apps suspended in the background without need to be restarted when being used again (Even, Safari often refreshes open tabs when I want to use them after a short while during which they were not active; such a thing has also happened on the older OS, but with much less frequency). One might expect such a bug for non-Apple apps because of non-compatibility with the new OS update, but it really surprised me that such a problem exists with Apple apps such as Safari and Pages. It is really annoying, especially when you are writing some post on a Stack Exchange network and need to use some other app. I wonder whether this can be avoided somehow. PS: It is worth saying that my iPad has enough free memory, more than that when running the older OS.