That's certainly not normal.

But what circumstances or condition that make the bike act like that? Straight line or in a corner? Rough roads? Uneven pavement?

Check your rear tyre is alligned properly. Has the bike been crashed? The frame is straight? The headstock bearings are in good condition? Tyre condition ok with no uneven wear?

If that is the case then you might want to take your bike to a shop when you do your first service and have them take a look at it closely, as it is under warranty.

A bike should not feel wobbly at 90 going down a smooth road.

In addition to the things I listed earlier, you might want to also check if your rear static sag and pre-load is set correctly for your weight. If you are too heavy for the current rear pre-load, it might cause a geometry change, unloading the front and causing steering vagueness. Check if your tyres are also properly inflated.

That’s the thing
Paying D400 UG price for a sack of potatoes also damn upset

Imagine paying Duke 390 price and get a sack of athletic potatoes. 😂

Any owners feedback on it?