The rubber spacers might stay on their screw posts in the frame when you remove the speakers.

Before reinstalling the speakers, follow these instructions to ensure the rubber spacers are in the speaker screw holes and not on the frame:

Orient each rubber spacer so the smooth side is poking out the underside of the speaker.

Insert one side of the spacer through the bottom of its screw hole.

Use the point of a spudger to press the spacer into its slot.