Strange happening with new brake pump

I guess my American friends got the brake pump recall too. I had mine done about 6 months ago.

Today something strange happened and I'll explain as follows;

We're all familiar with the floating sensation or loss of brake feel when driving over wet metal drain covers etc, that caused many recalls early in the gen3's life. The last update/recall appeared to solve my braking in such situations.

Well today I was driving along a regular section of road where this floating section could occur (wet drain cover on a hill near some traffic lights). The car hit the wet drain cover and the new brake pump went absolutely crazy pumping at high speed, yet the braking was totally fine and unaffected when it would have been pre recalls. No harm done or loss of braking and no floating, yet a very loud pumping going on for a couple seconds (it wasn't the ABS).

Would the floating issue have been in part caused by the old brake pump not being able to keep enough pressure in the system, hence why some owners still experienced the 'floating' sensation despite the many recalls?

Anyone else experienced this or is it complete coincidence?