This whole issue shows the dangers of relying on the internet for TECHNICAL explanations and understanding.
There was a real problem, yes, but as far as I can tell (my experience and reading what others say) it was NOT an "iOS 13.2 multitasking" problem, it was a problem with web-type stuff. "Non-web" multitasking (ie apps that weren't presenting web pages or web page wrappers) worked, IMHO, better in 13.2 than before (in the sense that apps stayed alive without being killed or losing state) for longer, and in the face of more other apps being launched, than in 13.1 or earlier.
Does this difference matter? Well it doesn't matter if your only interest is complaining to Apple to fix it. But it does matter if you want to understand what is going on (or at least want to present yourself as such...)