3485020 - Unable to open Excel when AO has unconfirmed dialogue or is loading data

When AO has unconfirmed dialogue(like Select Data Source dialogue or variable screen), or when AO is loading data, it is no possible to open Excel, a message 'Excel can't do this because a dialogue box is open' pops up and Excel is not launched.
"Image/data in this KBA is from SAP internal systems, sample data, or demo systems. Any resemblance to real data is purely coincidental."

SAP Analysis for Microsoft Office

Analysis Office, Analysis for Office, A4O, Analysis for Excel, A4O, Excel instance, Excel process, Excel processes, task manager, create process, reuse process , KBA , BI-RA-AO-XLA , Excel Addin , Problem