I would NOT reset, but I would put it in vacation mode until the thesis is over. The motivation will come back, and you want it to be fun, not a chore.
Then I would still not reset, but systematically remind myself of each kanji through the level pages, then just power through the reviews and take my lumps on the ones I forgot. but that’s a matter of opinion. When I did my reset, I was really disappointed that I remembered more than I thought or learned it back again really quickly, but I had put myself into “why is WaniKani so slow!” land again with no way to speed it up.