Syncthing detects devices, but does not sync folders

[leder11011]

My issue seems to be my Android 11 smartphone, as described here:

Sync many files slow ? Android11

So I’ve go seven devices, on a variety of platforms (Win10, MacOS, Ubuntu20LTS, Android 10&11), all syncing a number of folders, one of which has upwards of 30k small files. It’s a Joplin source directory structure, so lots of markdown text files and a bunch of resource files of varying types. All of that works beautifully, apart from the Android 11 device, a Samsung Galaxy S20U 5g. It is running Syncthing-fork (I moved to fork as the stock version had the same issue and I wondered whether for…