We're looking into this issue, it's our top priority. In the future, you may be able to fix this bug by viewing your opponent's base (tap "MY BASE") and then returning to your own (tap "BATTLE").
Same problem. It seems to stick, regardless of going to my base, resetting the game, etc. The displayed score of the encounter reverts, but once I click on it: returns to a team from a previous rift battle. Though once I fought them, and tried again, the battle became the correct one.