I've had this, of course I was told it was from weak glutes on the opposite side. Everything is weak glutes!
Knock wood, I don't get flareups anymore, and here are the things that I've done:
I stopped walking around the house barefoot and only wear "recovery" type Oofos instead of going shoeless instead. Arch support seems important for me.
Also periodically I find I need to reeeeeally stretch out the front of the offending ankle by pointing my feet, scrunching my toes, and even pushing those scrunched toes into the floor to really stretch out those tendons on the front of the ankle. And of course making sure I keep doing ankle mobility moves before I run.
Also, back to the weak glutes, just making sure I am not leaning to one side or the other when I'm running seems to help. I'd love to say I have solved all my core weakness issues but alas. At least I am more aware and mindful about it.
Last, I found
this info helpful also when I was figuring out how to rehab it.