Multi-monitor setups open windows, apps and dialogue boxes in "Main Monitor" and not "Active" Monitor

As of at least the May 2025 update, a behavior change has occurred in Windows, affecting Windows 10 and 11, around where application windows, applications and dialogue box windows open when accessed in a multi-monitor setup.

I have 3-monitors - laptop and 2-external monitors - connected through my Surface Hub. One of the monitors is designated as my Primary. The Primary hosts the "System Tray", although I have my taskbar set to show the Start Menu, Search Icon, and Task View icons on all 3 monitors. Active applications have the icon on the taskbar of the monitor where they are hosted and not on all three. All three monitors are set to Extend and none are Duplicated.

Prior to the May 2025 update, when I have my Outlook application hosted on Monitor 2 (no the primary) and launch Compose Email, an Email Editor window for composing the email opened in Monitor 2 where Outlook was hosted. Since the May 2025 update, that Email Editor now opens in Monitor 1 (designated the Primary). Irritating, but easy to move over. Not efficient, as it takes extra actions (Win +Shift + Right Arrow, or Drag with Mouse). However, as I am typing my email message and need to place a hyperlink in the email, I highlight the text and right-click to open the dialogue box for entering the URL, only that dialogue box opens in Monitor 1, not the active Monitor 2 where I am composing the email. I have the web browser open in Monitor 1 and sometimes have to move the dialogue box to access the URL, but no matter what, clicking on the web browser window to select the URL brings the web browser forward and sends the dialogue box backward. I have to use Alt + Tab or Win + Tab to get back to the dialogue box to complete the entry of the URL and task of hyperlinking the text.

This issue of dialogue boxes opening in the Primary monitor of a multi-monitor system is not limited to Outlook, it affects all Microsoft 365 applications and, for that matter, all applications within the Windows environment. It decreases the efficiency, adds additional movement/actions, and increases the time to complete tasks. While some tasks literally take seconds to complete, so independently may seem frivolous to be concerned with, each task is but one action in any project, and the compounding of these issues adds up to some significant delays and overall decrease in efficiency.

I have tried to address this issue through Outlook Help --> Contact Support, but this is more of a Windows OS issue and not an isolated application or suite of applications issue. If this is a behavior that is intended, understand the negative impact it is creating. In this situation, I would respectfully ask that the behavior be identified as a setting and a toggle added to settings that allows users to select if they want new windows, applications, and dialogue boxes to open in the active, main, or other designated monitor.

If this behavior is unintended, please fix it ASAP with a very near-future update ... preferably the next update.