Xiaomi Magic Cube (MFKZQ01LM) side attribute broken in HA when legacy: false

[Mr-Groch]

What happened

If I set legacy: false for Xiaomi Magic Cube (MFKZQ01LM) then side attribute that is exposed to HA in auto discovery is not updating (action_side attribute in MQTT topic is updating for a short time only, but this is not permanent attribute in HA)

What did you expect to happen

Also for legacy: false setting it shoul be possible to always read on what side cude is in HA entity

How to reproduce it (minimal and precise)

1. Set legacy: false in devices.yaml for Xiaomi Magic Cube (MFKZQ01LM)
2. Flip cube and observe that side attribute is not updating

Debug info

Zigbee2MQTT version: 1.17.0
Adapter hardware: CC26X2R1 zzh!
Adapter firmware version: 20201113

[Koenkk]

Fixed, thanks!

Changes will be available in the latest dev branch in a few hours (https://www.zigbee2mqtt.io/how_tos/how-to-switch-to-dev-branch.html)