Log off Interaction Center when a transaction launcher session

Hi experts,

We are launching a CRM Transaction from the IC webclient (CRM 7.0) using Transaction Launcher. CRM Transaction is opened a new IE window or tab.

My Issue is that when we close CRM Transaction, but sometimes it also logs off Interaction Center.

Sometimes we can close IE window with CRM transaction and Interaction Center remains open. So we can launch another transaction launcher.

This issue is not happening if we launch a ECC transaction.

It seems WEB UI Framework does not handle cookies correctly when transaction launcher opens tcodes from CRM itself.

We've removed "enforce log off"  and "end session inmediately" from technical profile definition, but it didn't work.

Any idea how we can avoid loggin off when closing IE windows?

Thanks in advance.