About a week ago I used my Gear VR for the first time since my Galaxy S8 updated to Android Oreo. It worked fine. Since then, though, my phone has been randomly popping up "Gear VR undocking issue / tap here to finish undocking your mobile device" notifications. It seems to happen about once per day, despite me not having used the headset since last weekend. Every time I tap the notification it disappears, only to come back later or the next day.
The notification didn't appear at the time I removed the phone from the headset, only sometime later and then multiple times since. Is there any way I can fix this?