I have a 2020 Samsung TV (UN65TU7000FXZA) running Software Version T-KTSU2AKUC-2601.1. Whenever we watch a video from any of our apps, every 30 seconds or so there's a slight video and audio stutter. Occasionally it degrades further and whatever we are watching becomes quite unwatchable. I've done some troubleshooting already

• We get 1 Gbps internet and the router is right next to this tv, so internet connection shouldn't be an issue.
• We tried updating the firmware by downloading the latest to a USB drive and installing it, but found the TV was already on this version.
• We tried clearing off space on the hard drive as I noticed there was only about 7% free space previously. This is now 13% free.
• We tried soft resetting the TV by unplugging it for 30 seconds, and then powering it on and holding the power button on the remote for 5 seconds

Does anyone else have any advise of other fixes to try?  I love this TV otherwise and would love for it to be performing smoothly again