Weird clutch issue this week too

[71Laverda750SF]

Had a similar clutch issue on my beach ride on the 1200. Everything was normal for the ride until we stopped for a few hours, started fine but would keep dropping into gear from neutral and the clutch had no affect on it. I even tried adjusting the clutch cable to no avail. Traffic was heavy and I was the one blocking it, then I hit the starter for the 6th or 7th time and it all cleared up. We rode for another two hours stopping a couple of times and no issues at all. Let it sit at home overnight and still no issue. There is little time on the clutch since overhaul so I wasn't thinking plates but it sounds like it was. Any tips on keeping it from doing it again?

Thanks

Clay