Same thing here for the Senai / Desaru toll in JB.
You have to drive really slow or even stop below the sensor in order for it to detect, I have my RFID installed on the top left of my windshield (outside), so its easier for the sensor to pick up the tag.

for open loop toll, it's fine. just go to whichever lane that has no queue

the screwed up ones are the closed loop tools.. i see RFID no queue, i enter using RFID. upon exit toll, i see RFID got issue, long queue

now i gotta queue up at the RFID for nothing, cannot choose TNG lane because will get penalty for entering and existing using diff method