Is it normal for a bed to need releveling every single print?

Cold garage is a bigger factor than you'd think. Aluminum has a decent amount of thermal expansion, so a bed that's level when cold will sit differently once it heats to 60 degrees. And the frame itself shifts a little as it warms up during a print. If you're leveling cold at night and printing the next day, you're basicly chasing a moving target. Try leveling with the bed heated to your usual printing temp and see if the front left still drifts. My money says the gap changes.

Same thing happened on mine last year. Turned out the eccentric nut on one of the bed carriage wheels had loosened just enought to let that corner sag, and I never noticed because the wheel still felt snug by hand. Took two minutes to tighten it back up and the drifting stopped completely. If yours checks out there, a sheet of glass bolted over the bed sorted out my warped spot. Mine had a low corner I could never level out no matter what I did with the knobs.

Leveling with the bed hot won't tell you much though. Aluminum grows sideways as it warms, the gap under the nozzle barely moves, so chasing a corner drift with heat is barking up the wrong tree in my view. What actually shifts overnight is mechanical, ussually a leveling knob backing off or the plate sitting differently on the carriage. Easy test, drag the printer inside for a week. If the front left still drops in a room that holds a steady temp, the garage was never the problem. Mine acted the same and one knob had backed off on its own over a few months.

Update: went back and checked the eccentric nut on the bed carriage like the second reply said. Sure enough, the one under the front left was a hair loose, and I'd never have caught it because the wheel still felt fine wiggling by hand. Gave it a quarter turn, re-leveled, and I've done three prints since with clean first layers. The garage cold prolly wasn't helping either, but that nut was the real culprit.