Cursor stops blinking

- [x] I have fzf 0.23.0 or above
- [x] I have read through https://github.com/junegunn/fzf.vim/blob/master/README.md
- [x] I have read through https://github.com/junegunn/fzf/blob/master/README-VIM.md
- [x] I have read through the manual page of fzf (`man fzf`)
- [x] I have searched through the existing issues

Hi,
my cursor stops blinking after, for example, `:Files` or `:Ag` (independent of using fzf or ag). It already stops in the popup window, and it it doesn't return back to normal when closing it with Esc / Ctrl-C or when going into a file by pressing enter. I have to restart the terminal to restore the default cursor behavior.
I'm on Ubuntu 20.04 + vim 8.2.3388 (built from source) and same thing happens with the minimal configuration as well.
Any idea what might cause this? Thanks.