Bugs in the new site interface

In some threads, it is impossible to navigate from the first page to subsequent ones. Examples: 1 2
In other threads, it is impossible to navigate from the last page back to the first. 1

On the mobile version, after opening the extended message editing menu, it is impossible to click on changing the font or its size — visually, it seems like the clicks "miss" the buttons.
Also, on the mobile version, if you open a message being composed as HTML code, you cannot then convert it back to formatted text.