Does this happen every time you play that path? :Yes
Does it crash immediately or only after some time of playing the path? :Immediately after pressing play
Can you jump to all the time keyframes without crashing? :Attempted jumping to the 1 minute time key frame and got this https://imgur.com/a/9amBvzw, My actual game never had entities dropped everywhere like that... jumping between them is fine but spawns alot of particles
Does rendering the path also crash? If it does, that crash report might have more clues because replaying works slightly different during rendering. : Just rendered the whole path with no problems.
How about other paths? : Haven't tried other paths.
How about other replays? : First time making a replay in this pack but haven't had this issue prior to this pack.
I do a lot of tree breaking and picking up entities? could that cause problems? The only things actually being rendered (only things placed in a void world) are
acorns/resin/saplings/wood from the sky orchard mod
oak slabs, oak planks/cobblestone/dirt block from vanilla
particle effects when I spam crouch to grow trees quicker, also from when I vein mine blocks particles drop
drying rack from tinkers construct
crafting slab from slab machines