Sailboat regen

I have a 35ft sailboat which I've converted to electric motors.

All works fine except regen.

I need forward and reverse but would like to be in regen mode while sailing (Recharge my batteries when under sail)

I've tried Duty cycle reverse center and now will try current reverse center.

It seems that when the motors stop turning for a moment they completely lockup and won't start turning again... Like a parking brake.

Hopefully someone can help me figure this out... I've tried 1A regen/brake and still the same.

Basically I would like to regen at center...

Anyway to do that?

Cheers!

Marc