Confirmed these are actually the same code:
dash-to-dock docking.js line 2036
ubuntu-dock docking.js line 2051
** Also affects: gnome-shell-extension-dashtodock (Ubuntu)
Importance: Undecided
Status: New
** Changed in: gnome-shell-extension-dashtodock (Ubuntu)
Status: New => Con
Other than the exact line number, this looks close to
https://github.com/micheleg/dash-to-dock/issues/1332
** Bug watch added: github.com/micheleg/dash-to-dock/issues #1332
https://github.com/micheleg/dash-to-dock/issues/1332
** Also affects: dash-to-dock via
https://github.com/micheleg/das