Question about Philips Hue White Ambiance Starter Set

We have been using the Hue White Ambiance for a few months now (Bridge, Apple Home App), so far everything is fine. But since a few days one lamp reacts to hangers (?!?). I don't know if it's the noise when they come together, or if it can affect the wifi signal in some way (they are metal hangers)??. I can't really explain it somehow. The reaction is that the lamp, which is always set to warm white, changes to cold light during the "chime" of the coat hangers and flickers a little, but as soon as there is silence, the light remains cold. This can't be right somehow, can it? Has anyone had similar experiences or can explain this somehow?