My CFS isn’t reading the RFID tags from the 4th slot. I thought it might have been a bad tag, but I tried different rolls with the same result. The other 3 slots reading with no issues.
Very strange, because the fourth spool share the reader with the third one!
My bad, the CFS Lite of the SpakX HAVE INDEED 4 NFC readers
having the same issue, but with slot 1,2, and 4
My bad, the CFS Lite of the SpakX HAVE INDEED 4 NFC readers
you could see if the antennas are loose or interchange the modules to test them.
The RFID in mine does not work at all.
There are some user reported after flashing the latest firmware there are some issues with the RFID on the CFS Lite. I will suggest to do a factory reset and redo all the calibration see it that works.
If after the factory reset and still no go. Please contact Creality Tech Support for further assistance.
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I’ve been back and forth with this issue with creality since the 19th, still haven’t gotten anywhere yet, was working perfectly fine before the latest update, checked all antennas, rolled back firmware, factory reset and ran full calibration with no luck at all, been sending logs constantly as requested, hopefully they come back with something soon and I’ll update on what they say
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Any news on this yet?
Ive had a response this morning saying that its a technical error and to wait for the newest update, technical team is currenrly working on it so its now just a waiting game unfortunatly, fingers crossed this new update solves the problem as just before the update I rfid tagged all of my filaments 
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After the most recent update, I reloaded the RFID rolls and it is now reading them all.