Just a public service announcement that iOS 11.4 beta 3 (15F5061e) does not fix the iPhone X Suica Problem.
Meanwhile in other news Francisco Franco is still dead.
Goodnight and have a pleasant tomorrow.
UPDATE
iPhone X has a NFC hardware problem, for more information see:
iPhone X Suica Problem Q&A Exchange Guide (English Version)
iPhone X Suica問題Q&A交換ガイド（日本語版）