Strange Internet Problems on Debian 12 with Realtek RTL8822CE

Hey everyone! I'm facing some really frustrating internet issues on my Debian 12 laptop that has a Realtek RTL8822CE Wi-Fi adapter. My other devices are connecting just fine, but this one is acting up. Here's a rundown of the problems:

- GitHub repositories load but then throw an error and become inaccessible; also, searches don't work.
- YouTube tells me I'm offline when I try to search, and it only works after I reload the page.
- Reddit searches only succeed after a reload, and when I try to post, I'm greeted with a random Keanu Reeves meme instead of the regular posting screen.

A few more details:
- The issues happen on any network—guest Wi-Fi, hotspot, regular Wi-Fi, and even via Ethernet.
- I've manually set my DNS to Google (8.8.8.8) and Cloudflare (1.1.1.1).
- IPv6 is enabled in some settings but turned off in others, like the kernel.
- Sometimes, my time zone shifts by an hour when I change networks, though this hasn't happened in the last half hour!
- Ping tests show about 7% packet loss on this device only.
- I'm running kernel version 6.1.0-37-amd64.
- I've tried Firefox ESR and Chrome (but Chrome won't load—guess I'm using too much RAM).

This started suddenly about 2 hours ago. Has anyone experienced something similar or know what the cause might be? Any suggestions would be super helpful!