Controllers limit = 2 / controllers kicked off

[asdf.re]

Good evening.

I am trying my just bought Raspberry at the same time unboxing my 4 Xiaomi controllers, in order to setup a retro gaming station.

I am having a problem while connecting my controllers. All of them are paired. When I get more than two connected at the same time, some get disconnected. Being more concise: when I power on a combination of three or more, controllers 3 or 4 get disconnected, remaining always controllers 1 and 2. It's very strange. The controllers get disconnected, and then they power off.

Do you know what might be going on?

Lots of thanks in advance.