old LCD TV/monitor stuck at bad resolutions after NVIDIA driver updates

Hello,

I've been using my old (\~2007) 32" Samsung LCD TV as a second monitor for years. getting it to show at decent resolutions has always been tricky, but after Nvidia's latest Game Ready driver update (v. 546.65), I can't get it to stay at anything other than 1176x664p or 1280x720p (native, but overscanned). I want to say I had it at 1768x992 before the update. it won't function with anything besides 60hz, so none of the 30hz 1080i options work. I tried making a custom resolution of 1768x992p @ 60hz, and it tests successfully, but then that particular rez doesn't show up in the custom choices afterwards. it also goes back to 1280x720p when I reboot or come out of sleep. I use my TV all the time for watching videos and keeping track of OBS when I stream. help!

GPU: MSI GeForce GTX 960, 2 GB RAM

CPU: AMD FX-6300 3-core, 3.5 Ghz, not OC'd

OS: Windows 10 Home 22H2

RAM: 8 GB

primary monitor: Samsung SMBX2231

connection for both monitors: HDMI