We implemented an list box which contains ~500 items. When we try to filter it by copying some text from other editor (say for e.g. Notepad), and paste it on filter box, sometime filtering works and sometime its just don’t work and does not filter anything.
Please note that If we filter by keyboard, it works well.
This is a random behavior and happens when there are more items (> 500 items in list box).
We created a JS fiddle which renders list box with ~500 items and we are facing same behavior as described above.