Spear (Lunge Enchantment) Damage Inconsistent Between Snapshots 25w41a and 25w45a

In Snapshot 25w41a, when using a spear enchanted with Lunge, jumping to trigger an airborne dash and rapidly hitting enemies with the right mouse button deals significantly higher damage than attacking while running on the ground. However, in Snapshot 25w45a, this identical action now deals the same or even less damage as a running stab. This is unreasonable because the airborne dash maintains high speed, and the damage should logically correlate with the momentum, consistent with the behavior in 25w41a. This video is from Snapshot 25w41a, where the spear clearly deals significant damage with the Lunge enchantment—yet this high damage output is absent in tests of the newer snapshot (25w45a).