Add a chart
In the properties panel > Elements, check "Title" - "Title" appears in the chart as it should.
Uncheck "Title" - "Title" remains but it should not.
Checking/unchecking "Subtitle" behaves in the same manner.
Version is 126.96.36.199
Build is ea7cb86e6eeb2bf3a5af73a8f7777ac570321527
Happens with the x-Axis title and y-Axis title as well.
Arch Linux 64-bit, KDE Plasma 5
Build ID: a27eb931c22313d4dd5c73b35358c0532d20b79e
CPU threads: 8; OS: Linux 4.12; UI render: default; VCL: kde4;
Locale: fi-FI (fi_FI.UTF-8); Calc: group
Built on September 8th 2017
*** This bug has been marked as a duplicate of bug 117032 ***