When generating the Overall Test Coverage Gadget and group by Epic Link some percentages get misplaced

Description
If you generate the Overall Test Coverage Gadget and use the Group by with Epic Link, some percentages of the table are getting misplaced and even go outside the table.

Pre-conditions
Have a list of Requirement issues with Epic with a long name.

How to reproduce

1. Create a new Overall Test Coverage Gadget and add a Project or Saved Filter with the Requirement issues with the linked Epic´s
2. Select the Group by Epic Link
   

Actual result/Attachments
The percentage of the results is getting misplaced in some of the graph columns.

Expected result
The percentages should be correctly displayed