Commit 6952836a32270828b33c07cdaf1658949f3c2693 seems to trigger unexpected display issues.
Before this commit, when starting up terminology, I had this:

Note that my fish prompt spreads on two lines. There is no backscroll (which is expected).

Since commit 6952836a32270828b33c07cdaf1658949f3c2693, the same operation yields this:

.
Furthermore, there is a backscroll, at shown here: .