Node Being accepted but not transmitting message V3

Im having an unusual error for this location.
Im having trouble connecting to my gateway previous to my migration to V3.
Newer nodes closer to previous nodes (Good RSSI<-100 and SNR >9) are showing messages of being accepted in the network but the message never comes.
Any thoughs? RX delay maybe?

Update on the situation.
I left the sensores running (having only join accepted requests) and now 2 of them after one day it was accepted in the network.