I'd realign the optics first as that'd be my guess, overpressure can inhibit lines, but in a non-white light sytem, it
shouldn't matter all that much besides the starting issue... You might get lower power on the violet line and maybe
lose one of the greens in an extreme scenario...

If that doesn't help you'll want to check your current setting on the magnet as well... You may have turned it down
by accident and not noticed.