I had a GM rule the Jump spell wouldn't assist me in jumping. Others would. In D&D 3.5 there are explicit rules that allow the jump spell to remove damage dice when falling if it is a controlled fall. IIRC, DC15 to remove a d6 and +1d6 for every +5. In 3.5 this meant the jump spell could let you do a superhero landing from 3 stories up. Anyway I had a 5E GM rule i could do something similar. I had another rule that didn't work at all and I took full damage. Thus, I had to ask the absurd question "Does the Jump spell help me to jump?"
Needless to say, I have a bad taste in my mouth from that. From how popular 5E is I know it has to be a good game. I just haven't found the right game yet.