Gledopto GL-C-007P doesn't show up in zigbee network

[blazejosl]

Hi Guys.
Few days ago I bought Gledopto GL-C-007P and try to connect it to my smart home installation:

1. CC2531 dongle connected to QNAP NAS
2. zigbee2mqtt runs in a docker
3. mqtt broker runs in a docker
4. openhab 3.0 runs in a docker

Everything configured using text files and works fine (some xiaomi, aqara sensors, smart plugs, hue bulbs connected directly to the CC2531) so far.
Now I try to connect RGBW LED strip via Gledopto GL-C-007P controller but it is very resistant and does not want to connect to my zigbee network. I reseted it few times.
I've installed latest-dev zigbee2mqtt version (according to #5828) but I don't have any entries to database.db, any entries to devices.yaml.
Maybe someone can advise me what to do - the device is sort of invisible in my zigbee netowork.