They’ve been eaten by something, probably snails & slugs, check under the pots, I cut all the leaves off after fruiting normally, but only just got round to doing mine last week, so I suggest you do that as you plant them if you’re going to do it soon, gives the plants time to establish a good root system, looks as if they’ve produced runners as well, so you could chop them off too or pot them up/plant whilst still attached for new plants but that will weaken the mother plant but you could sacrifice that one to get more offspring plants.