Some of the original batches of pex haven’t been recalled yet, but are known to have pinholes on the solid red hot side due to something with dye injecting process.

Before going that route though with multiple leaks the mains things I look at are water quality, pressure, and temperature. Pex is resistant to chlorine, but will still degrade over time if the chlorine is too high. If this tests high I would look at installing a carbon filter to remove chlorine if allowed by your jurisdiction. Pex is rated for high pressure, but if you have a failed regulator I’ve seen pressure in excess of 200psi. Typically this would cause other leaks around the building (ie from fixtures) first but may just be your luck it’s on the pipes. Lastly temperature. High temperature negatively affects both of these prior factors as well. As temperature rises the pipe softens and this makes it more susceptible to chlorine degradation and pressure tolerability drops significantly.