At your weight, you're into what's often called "Clydesdale's" territory.
Meaning you do need good (rear) wheels if you want them to last.
32 spoke isn't all crazy, but a 36-spoke would have been better.
As would butted instead of straight gauge spokes.
Spokes breaking right at the hub is where they usually break, at the bend.
Nothing strange about that.
Thing is, a big part of wheel survival is build quality, spoke tension.
Insufficient tension makes the spokes fatigue fairly fast.
If you've ridden regularly, 4 months should be within range of beginning to see fatigue failures.
And once fatigue has set in, it can't be reversed.
Particularly with your history of spokes coming loose - which shouldn't happen to a well-proportioned, well-built wheel - odds are you'll keep breaking spokes unless the wheel is rebuilt or replaced with a properly tensioned wheel. Preferably a 36H with a stiff rim and butted spokes.