That’s very strange behavior but I’m glad to hear you have a workaround.
I am pretty sure that the Dualsense controllers do not implement the USB-C charging standard correctly, or Sony has done some additional proprietary stuff to it. As someone who wants to USB-C all the things, this is extra annoying to me.
This is going to sound ridiculous, but I found that the USB-C cable included with my PS5 will only work with my Anker USB charger if the USB-C connector is flipped the right way. In one orientation it works, and in the other it doesn’t.
It does occasionally catch on the inside of my pocket when I take it out, but usually it’s not a problem. And the extra grip is worth far more to me. I have literally never dropped my phone since I got one, and I can use my Pixel 6 Pro with one hand easily. I would never go without one.