align plugin cannot work when the fisrt line included

[theSprog]

When the first line was included in visual text, the align plugin cannot work.
But if I move the text to second line, and the plugin work again.

This gif might be more clear to describe the problem(I copy it from the readme).
I want to align 'end'，and first try the first line included in text，and the second try I move the whole text down and it works