Unable to pair lumi.remote.b186acn01

Good day everyone!

I recently purchased a house that came with Xiaomi Home system and a lot of devices and automations. Recently I started gradually moving some of the devices to HA. My setup is:
Latest HA running on Raspberry Pi 4 with HA OS. I have a SONOFF ZBDongle-E connected on a USB extension to it.

In the house I have a mix of older and newer wireless switches that are then connected to various relays inside the walls/ceilings.

On HA I installed ZHA + Added Xiaomi Home also. I’m having trouble pairing some of the switches, especially old ones to HA. For example when trying to pair lumi.remote.b186acn01, I don’t see anything in HA, or in the pairing logs. What I did already was delete this device from the Xiaomi Home app → long press the single button on the switch to get it into pairing mode → it flashes 3 times after a long press. However on the HA side still nothing appears. The battery is new. The dongle is super close to the device. I was able to pair a newer device, lumi.remote.b28ac1, without any issues.

Is there anything else for me to try?

Press the button every couple of seconds while pairing. Battery devices love to go back to sleep, even during pairing mode.
A short press of the button every second or 2 keeps it awake for long enough to complete the pairing process