logresumes only after I send some msg!

This snippet should explain.
```
10:04!-Irssi: Join to #irssi was synced in 43 secs
07:55 !-wilkowy_ is now known as wilkowy
08:15 +Necktwi: formats = { "fe-common/core" = { timestamp = "{timestamp $Z}";
}; }; doesnt apply to logs
08:15 +Necktwi: how to apply it to logs
09:19 !-sockarm [cfb7b3a0@gateway/web/freenode/ip.207.183.179.160] has left
#irssi []
09:21 !-water [~water@118.127.125.42] has left #irssi []
09:23 +kryten: help set log_timestamp
09:23 +Not-irssi: /set log_timestamp: The time format for log timestamps. ...
.. https://sck.pm/uPA
09:23 +kryten: Necktwi: ^
09:25 +kryten: Nei: In this context, on generation of
, apparently any trailing spaces in the settings are
disregarded.
10:00+Necktwi: kryten, done
10:05!-Irssi: [logresume /home/Necktwi/irclogs/2018/Freenode/#irssi.11-27.log]
10:05+Necktwi: log won't resume unless i send something!
10:09Loaded scripts:
10:09away /home/Necktwi/.irssi/scripts/autorun/away.pl
10:09emoji /home/Necktwi/.irssi/scripts/autorun/emoji.pl
10:09logresume /home/Necktwi/.irssi/scripts/autorun/logresume.pl
10:09savecmdhist /home/Necktwi/.irssi/scripts/autorun/savecmdhist.pl
10:09!-Irssi: Window hidden level is now HIDDEN

```