If a language newly appears/disappears in/from SLOCCount report the trend graphs will contain graphical artifacts. The issue is visible mainly in the delta trend but it is (and always was) present in the absolute one too. The code doesn't consider that currently processed build may contain different languages than the previous and next ones.
See the attached screenshots.
|Field||Original Value||New Value|
|Status||Open [ 1 ]||In Progress [ 3 ]|
|Fix Version/s||current [ 10162 ]|
|Resolution||Fixed [ 1 ]|
|Status||In Progress [ 3 ]||Resolved [ 5 ]|
|Status||Resolved [ 5 ]||Closed [ 6 ]|
|Workflow||JNJira [ 153121 ]||JNJira + In-Review [ 207300 ]|