I had a similar problem with a remote a few years ago. The bluetooth xmitter on my phone interfered with it.
Another time, a new light bulb in the same room interfered with the signal. The up-volume command would issue but not stop when my finger released the button. Crazy jumps to the volume knob on that one.
Perhaps something else - new - is creating an issue with the remote signal beam.
(Of course, I have more than once incorrectly installed the batteries in the remote. So there's that.)
Good luck.
Another time, a new light bulb in the same room interfered with the signal. The up-volume command would issue but not stop when my finger released the button. Crazy jumps to the volume knob on that one.
Perhaps something else - new - is creating an issue with the remote signal beam.
(Of course, I have more than once incorrectly installed the batteries in the remote. So there's that.)
Good luck.