This is just bro-science but I will lower the dose step by step and not quit it cold turkey. From what I've been reading, it makes sense to let your hormones readjust and that takes time. If you quit cold turkey you will be your endocrine system go ballistic and in overdrive for a few weeks...
Maybe you're just in the shedding phase. Give it more time if you don't have any sides. Same happened to me, right-hand side of the hairline receded faster. I don't think there's a specific reason for that ... male pattern baldness doesn't follow any rules.