No modify event emitted when the content isn't changed

[whatacold]

Hi,

Just tried beholder a bit:

(require '[nextjournal.beholder :as beholder])

(def watcher
     (beholder/watch prn "/tmp/"))

But it didn't emit the modify event when the file is not changed, for
example, run touch /tmp/t.txt. But it did when I changed the file by
doing date > /tmp/t.txt.

Is it by design?