The list should remember my place
A small scroll position can save more work than another clever filter.
I don't like opening a long list and being sent back to the top every time I look at something.
Say I'm checking a queue of files or messages. I open one item, go back, and the list resets. The software hasn't lost anything important. It has just forgotten the one bit of context I was using: item 47 was next. Now I have to find it again, sometimes by scrolling past the same rows I already read.
Keep the position when Back returns me to the list. If the list changed underneath me, show a small note or put me near the old item rather than pretending nothing moved. A refresh can justify losing the place. Opening a detail view usually doesn't.
I don't need a dramatic "Welcome back" message. Just let the list be where I left it. There is enough search-and-rescue in ordinary software already.