Since a few weeks ago, I have been noticing that the outer screws of my bass's bridge (the 1st and 8th one in the picture below) are completely "unscrewed". This means that the outer ends of the bridge are resting directly on the metal plate below it, instead of resting on the screws.
Is this normal?
My guess is that vibrations could gradually have made the screws come loose, but I don't know how plausible that is. For the record: I don't feel like there's anything wrong with the action of the strings, nor is there an issue with the pitch when playing high up the strings.