is resarting unity to update scripts a bug or an error on my part?

for the past few days, I have been having to get off and back on unity if I want a script change I made to work. is it a problem of I need to change something, or is this a bug and I need to report it? (I hope not, tried that once before, it took over an hour with a 647mb data and it was not even close to finishing...)