OJS & Google Analytics Usage Statistics

Hello, I recently ran usage statistics using OJS’s Report Generator and compared them with those provided via-Google Analytics. The results were very different. A bigger problem was that in the OJS stats, in August 2019, all hosted journals (except one) saw a massive increase in the number of journal home page hits – from the hundreds to nearly 40,000 in some instances. The discrepancy between the stats makes me unsure about which one is/isn’t accurate. Has anyone else experienced this before? Can you advise on the sudden increase in home page hits in the OJS stats?