If my Munich one would be around that time, I'd actually be relieved if it was 2020 instead of 2019, I already have a concert on 9/2 and one on 11/2 and with my luck Liam-in-Munich would be on either of these dates or in between them!
Its either a typo or fairly concrete evidence of the second album/tour cycle.
Personally think it's the latter.
Liam's album would be out next autumn, most likely, which would make sense.
It still isn't finished as far as we know, and then given they like to have a fair few months of lead-time, in that situation it'd probably be a case of having a single out around May/June like with Wall Of Glass.
Alternatively, no single until later in the year and the album drops next November/December time.