bleed the inching valve 1st (even if you didnt touch that side)
then bleed the wheels

i used to get the same issue a lot
never even thought of touching the inching (since i didnt touch it in the 1st place)
but apparently when the pressure is lost on the service side
the inching master loses some sort of equilibrium and you have to reset (bleed) the pressure on that side before moving back to the service side

pssed me off whn i realized what the stupid issue was lol
i tried every trick above and none really work
you might get ehh pressure back but the inching is sloppy (internally) and you wont get a good service brake pedal