Probably Bug: DP responsive Ipad issues

Hi, I just tested out the DP responsive site on my Ipad. When I go to the submission page, the “categories” (transfer) select boxes don’t work. All you can see is the following message “0 items” on both left and right columns. On Desktop things work fine and I can see the list of categories on the left, ready to be selected and transferred to the right side column. I have a screenshot, not sure how to upload it here.
Anybody else has notices this issue?
Thanks,