Fortunately, AppleInsider claims that sources within Apple (who were not authorized to speak, but did anyways) suggested there are "assorted GPS fixes" included in the upcoming iOS 11.2 software update, which are actually present in the iOS 11.2 beta release, currently. Some Apple Support Forums members, accordingly, have acknowledge that the issue has been rectified on their iPhone 8/X running iOS 11.2 beta. So a fix is clearly in the mix — it's just a matter of time now before the problem is patched for good.