This seems to be an ongoing problem with many streambars. It just started for me when I upgraded to a new TV (TCL - 55" Class Q-Series QLED Mini-LED 4K UHD Smart Google TV). It started with the Paramount plus app and has now spread to all apps. I have updated all firmware, did a hard re-start, tried multiple HDMI cables, tried different inputs on the TV, tried multiple sound setting on the roku as well on the TV. It appears to be getting worse every time I turn it on.