Same issue here, for a few weeks now I think. Folders/subfolders turn into the first site listed inside the folder, and the rest of the folder's contents is deleted. This is not for every folder, but does appear random.
Win 10 1803 x64
Opera 55.0.2994.44
Chrome 69.0.3497.100
Service d'assistance aux clients par UserEcho
Same issue here, for a few weeks now I think. Folders/subfolders turn into the first site listed inside the folder, and the rest of the folder's contents is deleted. This is not for every folder, but does appear random.
Win 10 1803 x64
Opera 55.0.2994.44
Chrome 69.0.3497.100