Misalignment and extra white space in Rise

I've been using Rise for a client. I don't have any outcome data yet, but I'm concerned that Rise has issues that increase cognitive load and therefore impact the quality of instruction. The most concerning issue I have is with image mis-alignment in the various image blocks. Alignment is a foundational design principle, yet the various image blocks are not aligned with other text blocks. They blow out of the margins. Also, the amount of white space between blocks, and the way text renders next to images in the Image & Text block, causes a spacial contiguity issue. Is anyone else experiencing issues with misalignment and excessive white space in Rise?