a) The screen output of the lsl
30 2021-04-21 12:19:50.244468986 ESCDELAY.3ncurses.gz.rclonelink
In the meantime I can report the following
b) I tried to create a new simplified source containing just a few symlinks, both to folders and to individual files, and all the symlink names a single word. Both types of symlinks carry the problem.
c) I then tried to change the destination from WebDav to Google Drive, and the problem and error messages are the same, so it's not a webdav-specific problem.
d) I tried to use copy instead of sync, no difference.
The runs complete with a number of errors equal to the number of symlinks, and in the destination no sign of the symlinks.
I wonder if this could be something specific to Termux (this is an unaltered Termux install apart from a few aliases added)?