Any thoughts on possible sources? I see this mainly on the higher bands 20 and 17m. Only happens every so often but I caught it twice in a row tonight so I thought I'd take a screenshot and ask. I *think* I saw it once in combination with a jump on the s-meter on my IC-7410 but can't really be sure about that. It doesn't happen frequently enough to sit and watch (or listen) for it. It really doesn't seem like it bothers the copy on FT8 but I'm curious about it. NB-I was calling someone at the time so that's why you see 30 sec segments here.