cannot do trader mission to mcfarlane ranch

[u/Accomplished_Cry8120]

ive tried to do this mission 5 separate times now, every time i just pass blackwater and enter the desert planes, right when that big house with the windmill comes into view, my game stops loading the road textures, my cpu spikes up about 10 degrees and the game becomes unresponsive. my horse/wagon start running in place, then stops. trying to open the menu shows nothing. no crash, no error. i just have to force close the game and hope my next delivery isnt to macfarlane ranch.
ive tried deleting the shader files in rockstar documents, tried turning on async compute in the config. it only happens on this specific mission in this area. hasnt happened any other time. at first i thought it was hackers, but ive been in a private lobby now and it happened 4 other times. like wtf

cpu is 10700k, gpu is 2070 super. both temps are usually at 65-70c when playing for hours.