Recently found out McAfee security software is installed on Samsung TVs running Tizen OS v3.0 or higher:
https://service.mcafee.com/webcenter/portal/oracle/webcenter/page/scopedMD/s55728c97_466d_4ddb_952d_05484ea932c6/Page29.jspx?wc.contextURL=%2Fspaces%2Fcp&locale=en-US&articleId=TS102629&fromSearch=true&platform=mobile&_afrLoop=1608731628359243&leftWidth=0%&showFooter=false&showHeader=false&rightWidth=0%¢erWidth=100%#!%40%40%3Fplatform%3Dmobile%26showFooter%3Dfalse%26locale%3Den-US%26fromSearch%3Dtrue%26_afrLoop%3D1608731628359243%26articleId%3DTS102629%26leftWidth%3D0%25%26showHeader%3Dfalse%26wc.contextURL%3D%2Fspaces%2Fcp%26rightWidth%3D0%25%26centerWidth%3D100%25%26_adf.ctrl-state%3D7o6hwv4ya_9
While security is typically a good thing, unfortunately, security software can occassionally interfere with normal operations, too.
If you choose to diagnose TV related problems, and delete McAfee Security for TV, you can follow the intructions in the linked article above to install it later.