browser.getWindowHandles() not returning all the tabs if opened by Extension

I'm testing a Chrome Extension using WDIO and Mocha Framework, which opens a new tab when installed and then opens an offscreen tab (hidden). From Chrome Version 137+, the browser.getWindowHandles() is not returning these 2 tabs in the response, hampering my automation.

Reproduce the Chrome Version 137+ behavior with the described Chrome Extension, WDIO, and Mocha setup, checking the result of browser.getWindowHandles() after the extension opens both tabs. Done means the returned handles include the extension-opened tab and the hidden offscreen tab, with the behavior verified against the reported setup.

Written by the indexing model from the issue text.