Questions not clickable on iPad

With Lectora I created a SCORM lesson package for Moodle which runs smoothly on PC's.

I try to get it running on an iPad. I know i cannot use flash or drag-and-drop questions,

but on the iPad I cannot select answer options for a Multiple Choice question (1 or more answers right).

Naviagtion buttons run fine.

Is there anything I can do about this?