@zerosquared
Imo there's not really a problem with the sensor itself but with the transmission towards the GW.
8696 !TSF:MSG:SEND,1-1-0-0,s=0,c=1,t=1,pt=7,l=5,sg=0,ft=3,st=NACK:56.64
The only exception in your log is wrt one temperature reading. So have a look at the troubleshooting guide; especially use a capacitor to enhance power sourcing of the nRF modules.
