steps to reproduce:
1 create event
2 select tab "participants"
3 enter participant's e-mail address
4 press "Enter"
expected result:
participant is added to the list
actual result:
nothing happens
steps to reproduce:
1 create event
2 select tab "participants"
3 enter participant's e-mail address
4 press "Enter"
expected result:
participant is added to the list
actual result:
nothing happens
Can confirm for: Chromium Version 71.0.3578.98 (Official Build) Built on Ubuntu , running on neon 18.04 (64-bit)
it works with autocomplete when the person is already in your address book but not for unknown addressees