According to comments on the U.S. Community page, via Android Police, users have been noticing that certain apps will cause the Note 8 to freeze up.
A Note 8 user started a thread suggesting the issue was connected to calling, however others on thread had reported the issue happening with a number of other apps and functions, such as: using speed dial, tapping on contacts in the phone or messages app, loading an Excel spreadsheet, opening contacts, using Pokemon Go, Chrome, the Google app, charging over night, opening the phone app and more.
Additionally, it appears the problem is not connected to any carrier as it was reported that users from three of the major U.S. carriers had been experiencing problems. It also doesn’t seem to be related to any specific country as users from U.S., Hungary and Spain have reported issues of freezing.
No user on any of the threads reporting the issue has seem to mentioned if they are Canadian, however.