Hi, We suggest you to perform wipe cache partition and check if the recent apps are working.
Below are the steps to perform clear cache partition.
1.Turn off the unit.
2.Press and hold the volume up button and press and hold the on/off button. When the Android logo is displayed, release all keys ("Installing system update" is displayed before displaying the Android system recovery menu options).
3.Press the volume down key repeatedly to highlight "wipe cache partition".
4.Press the Power key to select. Press the Volume Down button to highlight "Yes" and press the Power button to select. When the wiping of the cache partition is completed, "Reboot System Now" is highlighted.
5.Press the Power button to reboot the unit.
It's not a caching or transient problem. The Reccents feature is flat broke. If you pick an app like calculator on a phone with the new ui that app is then replaced by another random app.
The app that appear seem to only be apps listed in "choose apps to search in"
I'm sorry, but that's a terrible suggestion. The issue isn't with the cached app tiles, it's something fundamental that was broken with the last update. The recommended apps bar at the bottom of the recent apps page no longer works. It only displays four useless Samsung apps, not the apps most commonly opened by the user as it's supposed to.
Telling people to mess with their device at the system level to fix a non-existent issue is just irresponsible.
Please note readers: this suggested action won't fix the problem. Don't do it.
I noticed this too, then started wondering if I was crazy and misremembering how this has behaved on my Galaxy phones for years. I think those icons were the 4 most recently closed apps, weren't they? While the larger horizontal scroll group above is recent apps that are still open.