Try toggling and using the top toolbar instead (tap the icon at the top left corner of the Journal). You'll see a Camera icon there, too, and it may work better. One thing I have found (more or less always so since Day 1 of the eDGe, i.e., even before Dingo), is that taps on the eInk side do need to be forceful rather than light, otherwise they won't register.

It seems that the new menu system is a "Version 1.0" and will need refinement over an update or two