FWIW, I first publicly reported this same problem with iOS in Jan 2020: https://lists.zx2c4.com/pipermail/wireguard/2020-January/004860.html (with much more followup information in https://lists.zx2c4.com/pipermail/wireguard/2020-January/004874.html).
It still happens periodically on my iOS 13 (and now iOS 14) iPhone 8+.
It happens with much lower frequency than it used to, but it still
definitely happens sometimes.
--
{+} Jeff Squyres
