Which model do you have? No way this should be happening on a recent one just between two applications.
On the X (3GB) this doesn't seem to be an issue for me at all.
I'm really impressed by how long apps remain in RAM on my 8 Plus. I'll play a game before bed and find it still where I left off during my commute the next morning, and that's with some browsing/podcasts in between.
as soon as one of those app gets access to more ram, it will use all of it, and you will have the same experience
just look at desktop
We will have at least a good month of multitasking bliss ;)
You shouldn’t lose your place even if the apps get unloaded.