HM10 firmware v540 not able to scan all Bluetooth modules

Original question

I am using HM10 Bluetooth with firmware v540. I fired AT+DISC? in Arduino and only able to discover surrounding HM10 Bluetooth devices. i.e. not able to discover other Bluetooth devices, other than HM10 devices.

Firmware version below v530 has AT+FILT0, which is able to find all BLE modules. It has been removed since v530. Does it mean starting from v530, it is only able to discover HM10 bluetooth modules?

Did you ever make any headway with topic? I too am facing the same issue at the moment and wondering which direction to turn.