It’s possible for the opposition to get 4 turns in a row despite no negative effects on your party.
because of the way the turn order is set up when the numbers r unequal, you can kill off 3 of their team and have 4 of your team left and they can kill the one with the most TM, kill the one with the next most TM, then the next, then the final team member. That is they have 4 turns in a row while you just twiddle your thumbs.
Same thing can of course occur when you have 3 vs 1 or 2 vs 1.
The turn should transfer to one of your players not go back to them. This should be fixed as a priority
More generally the turn order needs to be looked at. I can see why you get more turns once the numbers r against you, otherwise initiative might determine all the matches - a quick kill and its 4 vs 3 with them having More numbers and turns. But it simply doesn’t work as Is. so many times I and others on the forum have had resounding victories only to be “beaten” in utter ripoffs. Just now fir example I killed 3 of theirs had 4 vs their wizards, who then managed to kill my whole team across by the refresh of abilities from so many turns