I can’t address this directly, as I have the FW16 which doesn’t seem to have this problem (and also limit the charge to a max of 80%). I will note though that Framework has extended the warranty on the 61W battery by an additional year, so if you do run into this problem, you should be covered.
I can also point out that Framework isn’t the only manufacturer to run into this. I had a MacBook Pro a few years ago that did the same thing, a little over a year after I bought it, and greedy and abusive Apple insisted that it was my fault and I had to pay for a battery replacement, nevermind the fact that there was no setting at the time that could have made any difference (I don’t think they’ve added one since, either). Framework’s response is far better, particularly as you can replace the battery easily yourself. Apple forces you to take it to them, and pay their abusive repair rates.