**Description** <!-- When I delete a folder names .@__thumb on far host , local host can't sync this delet action --> **Expected behaviour** <!-- I think local Syncthing folder should deleted this sub-folder names '.@__thumb' --> **What is happening instead?** <!-- But Syncthing display 'not sync' --> **Additional context** <!-- When I delete sub-folder names '.@__thumbsub-folder names '.@__thumb on the source host , Syncthing now display 'has Sync' --> **How to reproduce?** <!-- Tell us how to reproduce this issue. How can someone who is starting from scratch reproduce this behaviour as minimally as possible? --> **Files** <!-- A list of relevant files for this issue. Large files can be uploaded one-by-one or in a tarball/zipfile. -->