Having never been able to reproduce the problem, yesterday / this morning I have at last done so. All the shortcuts I created back on 28th June (see above) and since, have gone. These were mostly web-related, either simple URLs or PWAs created from Firefox, but also one Contact.
What might be useful in this, is that I know what I did differently last night. As I’ve already said in this thread, I turn my phone off most nights and have never encountered the problem before, but last night I needed to check something in fastboot mode. So I turned off the phone, then turned it on in fastboot mode, and having done what I wanted to do, used “START” to boot into FPOS. I hadn’t done this since creating the shortcuts back in June.
Unfortunately I’m not able to reproduce this just by returning to fastboot and then STARTing, but this info might point to something related to boot conditions which could explain the apparently random occurrences of the bug.
I have an SD card but frankly I don’t think it’s related. Looking like a FPOS Android 11 thing as things stand. And to be clear: it’s not just web shortcuts, any sort seems potentially affected, all mine disappeared at the same time.
I have informed Fairphone.