I have a multi-paragraph section of tiny-font within a larger document of normal-size text.
The last paragraph within this section seems to get double spacing:

I can fix the problem by putting a blank line before the final \end{tiny} but I don't know why this works.
Can someone tell me what is going on?
Here is the MWE
\documentclass[11pt,oneside]{report}
\begin{document}
This is normal size.
\begin{tiny}
This is tiny size. This is tiny size. This is tiny size. This is tiny size. This is tiny size. This is tiny size. This is tiny size. This is tiny size. This is tiny size. This is tiny size. This is tiny size. This is tiny size. This is tiny size. This is tiny size.
Why is this paragraph double spaced? Why is this paragraph double spaced? Why is this paragraph double spaced? Why is this paragraph double spaced? Why is this paragraph double spaced? Why is this paragraph double spaced? Why is this paragraph double spaced?
\end{tiny}
\end{document}