I do have a bit of an issue on the Libra Colour, actually. Every time the numbers change, I get a full refresh in the corner where they appear. It's a little distracting, and it didn't work this way on my Libra 2.
I'm not sure if it's something that can be fixed, but if it could, I'd surely appreciate it!
I've tried to attach a gif of the moment it flashes for reference, hopefully it works
P.S.: I have my refresh rate set to once per chapter if that's relevant