thank you for your Chrsitmas wishes :-)
Regarding the behavior you are pointing, we are trying to reproduce but at present we are still not able to.
Can you confirm you are using the latest 1.3 release of the iink? Indeed, in this latter release, there were some slight changes in the screen refresh in our iOS release. I cannot guarantee this will help, but just in case.
I keep you updated.
currently, we were able to reproduce the behavior. I confirm it also occurs on the latest 1.3 release of the iink.
I keep you updated when it is solved.