I can also recall when TNN showed episodes of Hee Haw, they never ever showed any with Stringbean, even though they show had been produced independently since 1970 (after one season on CBS).
I wonder if there had been some unwritten policy about that with TNN executives as that show in 1973-74 lost both Stringbean and Don Rich (Buck Owens’ main backup man in a motorcycle accident). Even though they showed episodes with Grady Nutt (air crash in 1982), Junior Samples (1983 from diabetes/heart disease related issues), and Archie Campbell and Kenny Price (both in 1987 due to heart attacks). You can, of course, watch Hee Haw episodes featuring Stringbean on YouTube.
RFD TV used to, and maybe still might, run Hee Haw. They’ve aired many of the earlier episodes with Stringbean.