As you can see in the screenshot above the battle area is showing that I have two of the little lemur things (I don't know their names) in my team, however if you look at the "your team" section you can see I should have one little lemur thing and one Lapistrix. I believe my synergies are also acting as if I have two little lemur things, as otherwise I wouldn't have enough companions with the Assailant synergy to create a full point in it

Simple things like removing and adding back my companions did not fix it

Edit: I got to the point where I could have 5 companions and the fifth is also showing up as a lemur. And my spider is no longer showing up at all

Edit 2: Played another round and my spider is now also a lemur

I hope this gets fixed soon, this is the kind of glitch that can make the arena genuinely unplayable

@Quiche I played a new arena game and it did not happen again, though I didn't use the lemur companion as it never showed up in the shop page. I'm not sure what the steps to recreating the bug might be, I'm not sure how it happened, I was just playing how I normally would. I had the lemur in my first companion slot and lapistrix in my second, and for the first few rounds it worked fine but then around maybe the fourth or fifth round the lapistrix was replaced by the second lemur. I suppose it could have possibly been caused by the third companion slot opening up or by upgrading the lemur to two stars? Those are the only things I can think of that happened around the same time as the lemur taking over the lapistrix

I am using Firefox, version 121.0, and I am using a windows 10 computer

Just got the same bug AspenCrow did in the Icerun arena. After the third companion slot opened and I placed the heron fishing companion in it, it was replaced by the panda cooking companion. I also had the lemur companion in the first battle slot, as shown in the screen shot below

I had initially thought that the bug was replacing the companion in my team with the most recently bought companion from the Icerun Arena shop, as I had just purchased a panda companion and a lemur companion. However, once I unlocked all companion slots and filled up my team, my heron remained a duplicate panda, my phoenix vanished entirely and the panda companion I had on my team seemed unaffected, as shown in the screenshot below. Additionally, changing my team composition didn't solve the issue.

Even though the bugged companions seem to use the same moves as the companions that they've been replaced with, the synergies are registering the actual team I've put together. If they weren't then the Dueler synergy wouldn't be as high as it is in the screenshot. Additionally, there's two one star pandas in my inventory as shown below, which for some reason are registering as apart of my team rather than the other companions I currently have.

Further experimenting, I finished upgrading my panda companion and then bought three golden unicorn companions and two blue fishing herons and lo behold, the golden unicorn shows up in my party now! The blue fishing heron is still missing but it seems like the Icerun arena is registering some of the companions in your inventory rather than the companions you have in your team. Here's what my current team set up looks like versus the companions in my inventory and the companions showing up in the Icerun Arena.

I'm running Lorwolf on Firefox version 121.0 (64 bit) on Windows 11 Version 22H2