Yes, I installed the kit myself several years ago. Normally don't do a lot of high beam usage until a recent trip. Thats when I notice this.For the WK2 platform that has quad bulb headlight system this is not normal. The low beam circut stay energized when the High beam circuit is activated.
Even if you are using an HID kit for your low beams you should still have functioning low beams.
Did you do wiring yourself? I am trying to imagine what someone could do to make this happen unless you had a relay harness that had an input for the highbeam that cut power to the lowbeam when it saw a positive 12v input.
Bottom line for quad beams this should not happen.
If you have dual beam (two headlights that have dual filaments) then this would be normal behavior as the headlamp circuit would switch from the low beam filament to the high beam filament to generate light)
( perfect example of this would be if had a 2005 - 2015 Toyota Tacoma pick up. If you installed a pair of Syder/Spec D/Eagle Eye headlights that had separate low and High beam bulbs when selecting high beams the low beam bulbs would shut off because the system is set up for a dual filament bulb.)