Hi all, I have a customer who is using Thunderbird to sync their iCloud account, they have a large number of subfolders but they are finding that the "subscribed" folder list is seemingly randomly removing a lot of them so they no longer sync? They have multiple devices with Thunderbird installed and it seems to sync this list between all devices apart from iOS devices, Is there a maximum subscribed folder list? If I re-select them all, it does work for a few weeks and then it'll deselect again, Any help greatly appreciated, Matt