Courtesy time signature not created when changing time signature

MuseScore 2.0 or master 888d7db4112dc310e04da1542e1773bb78ddaf6f

1. Create a score in 4/4
2. Add a line break after 4 measures
3. drop a 3/4 time signature after the break. Courtesy is showing at the end of previous line
4. Select the 3/4 and double click a 6/8 in the time signature palette

Expected result: 6/8 is displayed and courtesy 6/8 too
Actual result: 6/8 is displayed but no courtesy

Workaround: right click the 6/8 and check "show courtesy time sig"