Hey Greg!
I hope your project is going well.
One thing that I just remembered about I2C component yesterday is that Daisy does not have a pull-up resistor.
So, adding pull-up resistors could be a potential solution if you haven’t done so yet! Please reference this post on how to do that. Adding 4+ More DACs/CVs with Quad DAC! (Also, I2C tips!). Quad DAC is an I2C component so it’ll apply to what you’re doing.
Good luck!!