Reporting that I’m also facing similar if not the same problems. Running the KDE spin of Fedora on my Ryzen 7 mainboard and when asleep for prolonged periods of time it’ll sometimes refuse to wake up from sleep.
From what I’ve gathered from looking around the forums, it’s sometimes related to SSD firmware?? The Crucial P5 seemed to be somewhat infamous in the past, but I’m currently running Fedora KDE on a Crucial P3 at the moment, and I haven’t heard any issues with specifically those SSDs.
I’ll try to gather more data the next time it happens, including that journalctl comment mentioned.