GNU screen issue when multiple tabs are created from script and Guake starts hidden

So I have a script in autostart which creates 6 tabs in Guake and launches few diagnostic programs in 4 of them (`htop`, `vnstat`, `netstat` and `i7z`). Because `vnstat` and `i7z`’s output can be fit in less than half of one tab, instead of running them in separate tabs I tried to run `screen` with custom screenrc file that would split terminal into 2 panes and execute each command in its own pane. It worked – well, sort of.

All behaves as expected when mentioned script is executed when Guake window is visible. When it is not, output of `vnstat` and `i7z` inside `screen` appears few lines below, almost in the center:


I use Guake 0.8.5 which comes with Ubuntu 16.10, but behaviour is similar in 0.8.8 (just checked). Do you think it can be an issue with Guake or rather with `screen`?

Current Guake script:
```
#!/bin/bash

sleep 5

guake -e "screen htop -d 10" guake -r "-"
guake -n guake -e "screen -c ~/Dropbox/HOSTNAME-utils/screenrc-i7z+vnstat" guake -r "-"
guake -n guake -e "netstat -pvc --inet" guake -r "-"
# Open additional tabs
guake -n guake -r "-"
guake -n guake -r "-"
guake -n guake -r "-"
# Set focus on the tab with "sudo i7z" to enter password
guake -s "1"

exit 0
```
Custom screenrc:
```
split -v
screen vnstat -l -ru -i wlan0
title "vnstat -l -ru -i wlan0"
focus
screen sudo i7z
title "sudo i7z"
```