Mode line different on first and second invocations

[stefanv]

The first time org-pomodoro is called, the org clock appears first in the mode line, followed by org-pomodoro:

Thereafter, the org clock appears after:

The latter behavior is what I desire, since otherwise if I have two documents open side-by-side the pomodoro disappears from the mode line (mode line too long). How can I guarantee consistent ordering of the mode-line?

I tried to find the issue in the source, and my best guess currently is that it happens here:

https://github.com/marcinkoziej/org-pomodoro/blob/master/org-pomodoro.el#L637