Steps to reproduce:

1. Start with a buffer open
2. Open another buffer via :Telescope find_files (either the cmd or a keymap)

Expected: the new buffer is opened and the normal mode CursorLineNr highlight is displayed
Actual: the new buffer is opened but the insert mode CursorlineNr highght is displayed.

This happens because nvim sends a ModeChanged event to insert mode for typing into the Telescope window, as expected. However, there doesn't seem to be a ModeChanged event back to normal mode when the Telescope window closes and the new buffer is opened.

I have a workaround and will submit a PR shortly.