What the title says. I recently had a crash during one of my runs, and I was wondering if I would be able to restart Minecraft if it does crash, or would it just invalidate the run?

I know that it says that it says that other mods other than Jellysquid's game optimization ones. But I have replay mod for 1.16.1 fabric for other uses. I'm just wondering if I have to remove it before speedrunning or I can keep it on there for convenience.

I'm just curious for coop runs I of course take a few seconds to do /time set 0 and /save-off before the timer. But sometimes I was moved by a mob during this time period. What would happen if that happens? Would this even matter?

My friends and I are doing 4P co-op but sometimes they would get kicked out of my server for no apparent reason at the very start of the game when everyone is joining. They would join back and it doesn't happen again. Would this problem disqualify the run?

When I'm trading sticks to a fletcher, sometimes they give a discount. But sometimes they would increase the price almost twice as much. I'm not sure why that happens, even when your popularity is the same. Is there something I'm not in knowledge of, or is it just completely random?