Are you sure you made absolutely no changes to your pedalboard? You didn’t change the order of any pedals? Or whether or not they start switched on?
Supplying power to modern digital pedals is just a bit more tricky than just supplying the proper voltage and wattage. All analogue pedals have to sort of “warm up” before they work. That’s why most all analogue pedals engage the battery when you plug in rather than when you press the footswitch. If they “turned on” when you pressed the footswitch there could be an unacceptable delay, so instead they “turn on” but in bypass mode when you plug your guitar in.
Digital circuits have to do a bit more. They are essentially little computers that have to boot up. Just like your mobile device takes some time to boot up if it has been shut down completely, a digital effects pedal takes some time to boot up. The more complex the circuit, the more time it takes to boot.
Power supplies have something called a ramp up time. That is, how long does it take for the power to reach maximum when it’s turned on or when something puts a load on it. If the power supply doesn’t reach the required levels fast enough for the pedal to do its boot sequence, then the pedal can “hang” just like a ‘puter when one of the many interacting chips fails to initialize in time.
Now, imagine a daisy chained power supply with each of those pedals putting a similar but different load on the system with different timings. It all happens very quickly, but it’s not instantaneous. Initially, there’s a very spiky, dirty, distorted power signal that could be seen differently depending on where you are in the chain. That’s one reason that isolated power supplies are nice. The ultimate in isolation is each effect having its own specialized power supply.
My largish pedalboard is almost exclusively EHX pedals. I also use some daisy chained power supplies, and I also have a couple of pedals that just don’t play nicely with others. They seem to generate a lot of noise when sharing a power supply with some other pedals. Moving them around helps, but I’ve just settled on having them use their own supplied adapters. It’s simple. I start by adding a pedal to a daisy chain. If it works, great. If it does anything weird, it gets its own power supply. I’m sure I could solve the problem with a really expensive, professional, isolated power supply, but those have their own problems, like what do you do if you need a 24v positive tip? What do you do if you need a 9v AC power supply? And they don’t help you with vintage effects with plugs built into the box. So, you still end up having to run separate power supplies anyway, or spend even bigger bucks to get a power supply that supports that ONE effect you have that isn’t 9V DC Negative Tip Cylinder.