Machine wouldn't wake out of sleep

ThinkPad L13 Gen6, Fedora Silverblue 43. Just got into a state where I coudln’t wake the machine out of sleep, I had to force a hard shutdown. I had a look at journalctl but can’t see much, last messages are about system sleep, then it’s the next boot sequence.

Anything I should be looking for in order to avoid this happening again?

Did you test an older deployment of Silverblue 43 which is free of this issue?

Unfortunately this is going to be very difficult to test, because I cannot reproduce this reliably and most of the time the issue does not occur. So I can’t even be sure this is a regression caused by a recent deployment of Silverblue.

Have you tried reproducing the issue on a package-based variant of Fedora, i.e. Workstation on this particular machine, so we can at least be sure it’s related to Silverblue?

I did not, but I think this is not specific to Silverblue. I just happen to be running Silverblue here.