As a developer, i think the RAM mgmt problem is an issue in SFSafariViewController, and WKWebView in general, and the ability to refresh audio content in background (Spotify, Youtube) or PIP (Youtube, Twitter). A lot of apps embed web ui for a lot of reason, like Amazon, Twitter, Spotify etc. And I'm pretty sure all use those components. That's why you see a lot of reloading apps from background.
For example, in my iPhone X, Amazon, Twitter, Youtube, Safari, Spotify, all are buggy. If I only keep Messages, Mail (lol), and Phone apps, and maybe a game like Mario Kart in background, I have no issues with RAM Mgmt.
Xcode 11.2.1 GM comes with 13.2.2 iOS simulator. Developer since first iPhone OS 2.0 SDK, first time I see that. A hot fix for Xcode! With issues on older iOS! Fire in Apple house. :/ Hope for 13.2.2 release soon...