Hi Lucie,
Sorry for the delay in getting back to you.
The above mentioned issue is a known issue. Please follow the below steps to prevent this issue.
1) Add an empty Chart control to ‘Place holder’.
2) Later, add series to that Chart control.
Please have a look at the sample code.
[VB]
Ph.Controls.Add(Me.GraphInclusion)
InitData()
Here I have attached a work around sample for this issue which will explain you more clearly.
Chart without Default Series sampleThanks for your patience.
Best Regards,
Sureshbabu