I'm curious, I couldn't find much info at all in regards to this. Any ideas what the fairing goes through once it's captured?
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The main part that was getting replaced was the acoustic absorption panels. For use on Starlink launches they just take the panels out but for a less rugged payload they replaced them with new ones.
SpaceX did commission new material for the panels that would not absorb seawater so it is possible that they just flush them with distilled water now. They also moved the air vents for ascent so that they do not let in water when sitting on the ocean.
Notably very expensive payloads get new fairing halves to completely remove any possibility of contamination. I assume this is an extra cost service.
I think they just moved those vents - they are now nearer the joins, so they would be out of the water as it landed. The vents are needed, or the fairing would remove itself explosively well before it was clear of the atmosphere.