Can't succeed in making --exclude work

Help and Support
3

This should be the correct syntax provided the path to .foobar is /my/dir/.foobar

rclone sync /my/dir remote:/my/remote/dir --exclude "/.foobar/**"

Test using rclone ls

rclone ls /my/dir  --exclude "/.foobar/**"

Eg

$ rclone ls .
        5 one
        0 .potato/two
$ rclone ls . --exclude "/.potato/**"
        5 one