The current series icon (the blue square) is either not properly aligned or not sized correctly.
We should either align it with the text bottom or change its size.
Samples of different sizes : 6x6, 7x7 & 8x8
Attachment: Current bar graph series icon size
Attachment: 6x6 sample
Attachment: 7x7 sample
Attachment: 8x8 sample
looks OK as it is