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expand "Forum status" and choose evolution chart for either of values
Evolution over period chart should be displayed.
There seems to be something broken in general in evolution charts, as those work for some items and don't for others.
Thanks for the report! I can verify on the demo. Row evolution still works in dashboard but not in sub reports.
This bug was introduced as a result of fixing a bug in visitor log for Chrome browser, in 
Benaka, I think a better way would be to specifically disable doHandleRowActions for the JS datatable of the Visitor log templates (and real time widget) instead of selecting within the function if it's to ignore.
(In ) Fixes #3381, add ability to disable row actions in HTML datatables and disable them in visitor log to fix chrome issue.