Flickering on a High refresh monitor

Hi, i don't really know if this is the right place to post this, but i recently reinstalled sea of thieves, and have a problem, the game despite the fact that i have v-sync turned off changes my monitor refresh rate (it can even fluctuate from high 50s to 130s) and causes massive flickering which is strange, because when i played a month and a half ago my refresh rate stayed at 144hz and only the frames fluctuated, which was much more of a smooth experience, so here i am asking, does someone have a solution for this?