I am sorry, I didn't have enough time when this was posted to examine it further and afterward there were so many other things to do that I forgot about it. I have fixed it now for the next update. Then you can just turn "Settings > Display and Use > Agenda view > Show contact images > for phone numbers in the description" off.
I will try to upload a new beta version in the next few days.
Please don't hesitate to contact me again if you have further questions!
Kind regards
Dominique Gunia