Storyline block load time in Rise

I'm interested in this as well. I have two interactive forms that load really slowly (attached) and in another lesson, three interactive forms which load instantaneously. The slow the load ones are 2300 and 1700 kb in size and the instant load ones are only around 500 kb. I'm guessing this is why but it's really frustrating, especially when one of the instant load blocks contains numerical calculations! The slow to load ones do have three radio buttons as well as text fields but I wouldn't have thought it should take so long - like probably 30 seconds or more with the flashing dots. Can someone please help? Thanks!