Unattended service mode issues

Hello everyone, I would appreciate some support in relation to the RPA (UiPath) running in unattended service mode relating to an Oracle Web Application (HFM): switching to this mode some clicks, although executed (from the screenshots I see that the Bot clicks correctly), fail to send the command (despite the click, the new window does not open even if you wait minutes). In attended mode everything works perfectly and the new window appears within few seconds. I also saw that these windows are Iframes, maybe the problem lies there? I followed all best practices: SimulateClick, SendWindowMessages, WaitForReady, delays, but I couldn’t fix it yet. Any advice is welcome! Lot of thanks.

I attach both screen catched during attended and unattended execution