I think the Season pass is a good little innovation, but it seems to work like battle pass systems, so I think the solution could be that if you lose, at least you can't fall back into the previous tier, I don't know what the developers think this.
Udude18 me too 2 battle before I'll realized that, soo i'll hope the team is fast fixing this bug and give me back my combat points or give me some girl sard