How would you rate your PM3 ability?
What commands are you using?
It should come from factory in EM mode… it would be unusual if it wasn’t
The first half makes sense, the 2nd half, does not
Can you share your AWID info
lf awid reader
Your command to write will be something like this
lf awid clone --fmt 26 --fc 123 --cn 1337
This is again odd, Is your PM3 upto date?
Follow this, it might help
The FlexNExT is less surprising, It may be a loose connection between the Chip and the antenna
There’s something strange, in the neighbourhood…
Hopefully, the above answers have helped