I have been happily using my Premium USB-C HDMI hub to connect my Dell XPS13 to an LG monitor for months but all of sudden this week the connection to the monitor has become unstable.
When I initially plug in the USB-C connector to my laptop it does not detect the monitor. If unplug and replug the USB-C or HDMI it will repeatedly flash a few times, display on the external monitor for a few seconds. It never stabilizes it just repeatedly flashes on and off on the external monitor. Sometimes both laptop and external screen goes black and I must unplug the hub to get the display back on the laptop.
The firmware is up to date. The hardware configuration (Monitor, cables, location) has not changed.