Hmm That issue seems strange another user reported same thing if i remember but then he said he fixed it, I have no idea what you have in common but certainly could be a cache problem or something? Can you try redoing the purchase in incognito mode?
Now i ran a test with V1 and in this case I came one step further as in V2.
I turned on V1, hit auto direct in my Paypal account and in this scenario it stops on the OTO page.
I clicked the yes link and it shows infidently “WORKING…”
Hmm can you share the OTO page concerned? I’m sure it’s a common issue like most of the threads in this forum that say their OTOs are not working, it’s either because of using wrong URL or using #yes-link-multi.