Big issue i notice! My Nokia 7 Plus does not connect with my Samsung Gear S3 and "gear plugin" stop working, so how it can be possible with pure android system.
It still working with my Honor 7 and connection is easy and effortless.
So does it need some kind of update or what is going on?
(if this does not belong here, please could admin move it to right place?)
i had the same problem in the beginning, and it is working fine now.