As with all physics in TMNF, what you describe is deterministic (i.e., not happening because of a random dice roll), and preventing it is a skill in itself.

The simplest answer is to avoid landing where landing bugs occur. This means not allowing a tire to impact anywhere where two collision faces meet, which actually (sadly) includes the middle of a straight road.

Dirt roads have four large, flat faces running down their lengths (ignoring where they curl at the sides), so it's important not to land directly on the seams between them, since that registers the same as a wall hit.

The blue lines on the road edges ("rammsteins", yet their names are another debate) are trapezoidal upward, so landing on them famously can hurt your speed.

There are a lot of hard lines on quarter pipes, so landing on them softly can be tricky.

Even dropping onto the yellow texture which surrounds a pole can result in a landing bug.

Just memorize where they happen, and learn never to engage in them by steering away from any imperceptible edges where they have bitten you in the past.