Welcome to Android Central.
It's interesting that you were unable to find much about 10065. It may your browser or other terms you used with it. I searched, 10065 andro, and it auto completed to, 10065 android app. There I found several threads and other talk about it. The first one mentions it as a wifi error, which could go along with your noticing that it looks like the removed app icon. Anyway, this thread also mentions the OnePlus... you can read it
here.
This more recent thread mentions that messages are not received if this 10065 app isn't open. You can read more on that
here.
If none of these help feel free to post more about your issue and let us know what you found. If you would like to reply to this thread and receive notifications when others leave replies, please create an account. This link will help you do that..
https://forums.androidcentral.com/as...-new-post.html
Best wishes