I use diffusers all the time on my Beta (blue) chrony. No errors that way for me otherwise I get errors on clear days.
I have a very old shooting chrony F1 (red version) and use it without the diffusers, I think that is the reason why I get so many errors lol
I had a old red f1 and never used the diffusers. My new ProChrono I'm using the diffusers.
I've placed both in shade and direct sunlight with no problems. Only time I've had problems with the F1 was late evenings when light was starting to fade. I have not used the Pro that late yet.
Here is my set-up for my Marauder...