I use this one, I just tried it and it works since the update. I plug power into the usb c female port. "Topoint" USB C to HDMI Adapter for Samsung DeX.
https://www.amazon.com/gp/product/B078W4RXGR/ref=oh_aui_detailpage_o09_s00?ie=UTF8&psc=1
I just got mine today. And tried it out. It's the best 30 dollars I've spent this week. Here's the US link: https://www.amazon.com/dp/B078W4RXGR/ref=cm_sw_r_cp_apa_3ct0Ab6EW7K8W
I use this one, I just tried it and it works since the update. I plug power into the usb c female port. "Topoint" USB C to HDMI Adapter for Samsung DeX.
https://www.amazon.com/gp/product/B078W4RXGR/ref=oh_aui_detailpage_o09_s00?ie=UTF8&psc=1
I use this hub and it works perfectly. I have it connected to a monitor, bluetooth mouse and keyboard.
USB C to HDMI Adapter for Samsung DeX Station Desktop Experience for Galaxy Note8/S8/S8+/S9/S9+, Nintendo Switch, MacBook Pro 2016 2017 https://www.amazon.com/dp/B078W4RXGR/
I bought a similar one and it works similarly well: https://www.amazon.com/dp/B078W4RXGR/
There's just no reason to pay for Samsung's own thing.
The one that I bought has PD, but I'm thinking the ppor quality thing may be the issue. Here is the one I bought
The reason I put off buying a dex pad is because I heard that they were incompatible with cases on. But I would hate to keep going through adapters trying to find one that works.
I have one of these at home and keep one in my bag for on-the-go usage:
https://www.amazon.com/gp/product/B078W4RXGR
Works flawlessly for the Note 9 and Nintendo Switch with a good power supply; My LG 42" multi-client monitor powers the Note 9 and Switch from USB-C: https://www.newegg.com/Product/Product.aspx?Item=N82E16824025629
Also, I'm typing this in Linux for Dex right now :)