Works, but electrical sparks fly when I use the hub to connect my beamer via HDMI. Worrying. So, laptop without power cable (battery operation), plug HDMI into the hub, hub to laptop via USB-C: As soon as I get 0.1-0.2mm close to the port, there are small flashes between the plug and the port. Super strange. But it works normally. Also: Whenever I unplug the hub (even if no devices are connected to it), it makes a strange crackling noise.
Do others know this behaviour?

Question

Works, but electrical sparks fly when I use the hub to connect my beamer via HDMI. Worrying. So, laptop without power cable (battery operation), plug HDMI into the hub, hub to laptop via USB-C: As soon as I get 0.1-0.2mm close to the port, there are small flashes between the plug and the port. Super strange. But it works normally. Also: Whenever I unplug the hub (even if no devices are connected to it), it makes a strange crackling noise.
Do others know this behaviour?

Answer

No. It must be the laptop and the beamer...

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