The behavior is expected and isn't a 'Maxum' issue. All V-hulls do it. The problem is exacerbated by two proceeding events.
1) The expectation that the boat won't 'wander', thus holding course and expecting course to hold .
2) Oversteering once the bow has wandered.
You're not only going to need to actively steer, but also begin anticipating. If you start to correct once the bow has gone off course, it's already too late. There will be a delay in the boat's reaction. The boat will tend to continue heading off course despite helm correction. The bow will finally 'catch up' to the helm.
Then once the boat is back on course, helm correction from the adjustment back to being on course again is also too late. If you straighten course at the helm once the bow is on course, the bow will continue turning past the course. The helm correction is again too late, and the problem is perpetuated.
What you essentially need to do is see the bow begin to creep off course and adjust immediately. Once the bow begins starts to come back to center straighten out again.
In other words the helm correction needs to occur at the beginning of the bow movement, not the end. Boats steer from the rear, not the front (like cars). They are also slow to react, with delays (unlike cars).
You'll get used to it with practice.