I absolutely hate "smart" TVs! You can't even buy a quality "dumb" panel anymore. I can't convince the rest of my family and friends that the only things those smarts bring are built-in obsolescence, ads, and privacy issues.
I make it a point to NEVER connect my new 2022 LG C2 to the Internet, as any possible improvements from firmware updates will be overshadowed by garbage like ads in the UI, removal of existing features (warning: reddit link), privacy violations, possible attack vectors, non-existent security, and constant data breaches of the manufacturers that threaten to expose every bit of personal data that they suck up. Not to mention increased sluggishness after tons of unwanted "improvements" are stuffed into it over the years, as the chipset ages and can no longer cope.
I'd much rather spend a tenth of the price of my TV on a streaming box (Roku, Shield TV, etc.) and replace those after similar things happen to them in a few years. For example, the display of my OG 32-inch Sony Google TV from 2010 ($500) still works fine, but the OS has long been abandoned by both Sony and Google, and since 2015-16 even the basic things like YouTube and Chrome apps don't work anymore. Thank goodness I can set the HDMI port as default start-up, so I don't ever need to see the TV's native UI, and a new Roku Streaming Stick ($45) does just fine on this 720p panel. Plus, I'm not locked into the Roku ecosystem. If they begin (continue?) enshitifying their products, there are tons of other options available at similar price.
Most people don't replace their TVs every couple of years. Hell, my decade old 60-inch Sharp Aquos 1080p LCD TV that I bought for $2200 back in 2011 still works fine, and I only had to replace the streamer that's been driving it twice during all this time. Sony Google TV Box -> Nvidia Shield TV 2015 -> Nvidia Shield TV 2019. I plan to keep it in my basement until it dies completely before replacing it. The Shield TV goes to the LG C2 so that I never have to see LG's craptastic UI.
Sorry, just felt the need to vent. Would be very interested in reading community's opinions on this topic.
Your streaming box was either not configured properly, or was very low cost.
The most likely solution is that you need to turn on a feature on your streaming box that sets the output refresh rate to match that of the content you are playing. On Apple TVs it is called "match frame rate". I know Rokus and Android TV devices have similar options.
Newer TVs can detect when 24 fps content is being delivered in a 60 hz signal and render it to the panel correctly, but this doesn't usually work if you have the selected input set to any low-latency modes ("Game", "PC", etc)
Good to hear newer devices support this.
My experience was from quite a few years ago (2015ish). At that time, there was no such feature in any of the devices I tried connecting, including a few brands of Android phones, Fire TV sticks, and MacBooks. I remember reading into the documentation on other devices at the time to find something better, with no luck. That said, documentation was pretty poor all around so who knows? The most useful info I found was in threads on VideoHelp or AVS forums where other users reported similar issues on various devices. Android TV was still very new and very shitty back then.
At this point I would simply not buy anything that doesn't support VRR.