Recent apps missing after a few minutes of the phone being powered on

[Sentrist]

Hello,

I'm experiencing a problem where my recent apps list goes empty even if I haven't killed any of them. It stays empty until I reboot the device, after which all of them returns.

This problem has existed since the Lollipop, but it's more apparent in Marshmallow.

XPERIA M5 (E5663)

Android 6.0

[Sentrist]

Is factory reset equivalent to software repair? Because I have done it for an unrelated issue.

I am now using the phone with a different set of apps and the bugs still happens.

From what I could gather, the bug isn't caused by a particular app, but by how the system handles high-demand apps running one after another.

I'll try removing each of my current apps to see what would happen.