I've read in various places how less +F can be used as a improvement over tail -f. Today I had the following use case that does not seem to work as expected, and I'm pretty sure I've used it in the past where it did work:

mkfifo less-pipe
less +F -f less-pipe

Then in some other terminal:

echo foo > less-pipe
echo bar > less-pipe

After echo'ing "foo" to the pipe, less will print END and no longer show data coming in over the pipe (I remember in the past seeing Waiting for more data...). So it seems follow mode is not active at all. Is this a bug or expected behavior?

I'm using less version 590.