According to GNOME, GNOME 3.18 is not supported anymore:
** Bug watch added: GNOME Bug Tracker #772945
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Nautilus "Open in Terminal" is performing some useless operations and
causes an abnormal CPU activity on opening terminal
Status in nautilus package in Ubuntu:
When i select "Open in Terminal" from Nautilus menu, the terminal
opens in the current folder (as expected) and the cursor rapidly
blinks for a few seconds, ignoring attempts to type anything at the
prompt. During this period, the whole system freezes a bit and the
processor usage can reach 40% on a 6th generation Intel Core i7.
I am using Ubuntu GNOME 16.04.1.
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