2nd hair shed after 16 months on oral Minoxidil 2.5mg.

I started on oral Minoxidil 16 months ago. I had a noticeable initial hair shed after using it for 3 weeks that lasted about 3 weeks, then the new growth started and I have had really good results for this past year. About a week ago, I noticed another hair shed. It's not as drastic as the first one, but I'm definitely seeing way more hair in my brush and in the shower after I wash it (about 2x per week).

I've seen that some have a 2nd dread shed after about 6 months, but is anybody experiencing one after more than a year on OM?