To be honest I came across your post while looking for the colocation guide and LTE and 5G-NR colocation tools, which I did finally find.
We’re definitely seeing C-band on SA, can’t say if that’s the cause of our interference problems since the spectrum in 3550-3700 looks pretty ugly as well. APs see the most interference and upstream is getting clobbered except on the shortest links.
You guys have some PALs, is that not helping? Or not enough spectrum if you only use your PALs?
I think there were some changes detailed in the 22.0 release notes, sounds like they might explain what you ran into?