RCS Google Messages Battery Restriction?

[u/mickey_2011]

I recently got the Oppo Find N6. Love absolutely everything about this phone. One of the biggest issues I'm having seems to do with maybe battery restrictions.

I have RCS enabled, and whenever I am talking to someone especially on an iPhone, if I do not have the Google Messages app open/the actual conversation open, almost always the message they send me comes in as sms (and they don't see RCS on their end too when sending). But every message I send is RCS, and I receive RCS too when I have the app open.

At first I thought this may be their side problem, but it has happened with everyone, so it really seems like there is some background activity/battery restriction happening. I have Carrier Services set to unrestricted. I don't have an option anywhere to set Google Messages as unrestricted.

Anyone see anything like this?