I think I may have similar problems as you too?
I don't think there's anything wrong with my achilles or foot in general, as in there's no loss in explosiveness. But it hurts like hell after I've shut down. I come home to a meticulous icing routine and it's fine the next day. But once I play and shut down, it hurts like a mofo.
I got sick of it so I decided to rest it for a few weeks.