Suspended slabs don’t have the firm, supportive base as industrial or commercial flooring slabs on ground do.
Depending on how the concrete has been placed, deflection may result over time. This factor alone may pose a risk for cracking and deflection. Combined with the increased likelihood of damage—as the top side of your slab is now under compression while the bottom is under tension—and you have a potential recipe for concrete damage.
As with every other repair, a site visit to witness the issue and contributing factors is necessary to ensure the correct repair process.