This sounds like the so-called "modern standby" (S0 vs S3, if I remember correctly). I bought a thinkpad a while back with "modern standby" and the thing wouldn't last the night suspended, and would often wake me up with its fans howling and end up being very, very hot while suspended. I disabled "modern standby" in the BIOS and it was back to sleeping for weeks without losing charge. I have no idea if that's what's going on with Framework laptops, but "modern standby" is one of the dumbest changes I've ever seen in PC hardware. To my understanding it's to make laptops behave more like phones, but I've never experienced any meaningful difference in resume behavior between S0 and S3 suspend.