Recurring Hamstring/Calf Tightness

Someone please tell me what I’m doing wrong. I can’t escape this endless cycle of training-hamstrings/calf becomes tight/gravely- rest-repeat.
My shoes are fit with insoles.
I see a PT regularly.
I foam roll daily.
I’m running 3x a week, swimming once, cycling 2x/week.
Eating plenty, hydrating, supplements, blood work is great.

I cannot go more than a month without the issue arising.