SEPM with client on different version

Is there any issues running the new SEP client 12.1.4 with the SEPM server still on version 12.1.1?

We are extremely worried about some new viral activity and would like to have all clients upgraded to the latest version however we are pending on a server migration for SEPM (which will include the update to the latest version).

I've tested the Auto-update client functionality, deploying client 12.1.4 with the 12.1.1 SEPM and I havent noticed any issues, just wanted to post in case there were any known problems that may occure using a mismatched server / client version?