James, you are very welcome, but I don't feel very helpful. If this issue was at any speed, there are several things to check, but since it is specific to a speed, that limits things.
As you said, since it's intermittent, it is more difficult. Actually, it can become frustrating.
Regardless, let me know and if there is anything I can do to help, let me know that as well.
Thursday, June 30th, 2022 AT 7:39 PM