Latest build of the otter-browser attached. Seems someone is just doing code cleanup at the rate of about a commit a day.
Putting this in your environment makes the browser much more stable, just sad it is still alpha quality. Even copy and paste seems somewhat broken.
set QTWEBENGINE_CHROMIUM_FLAGS="--single-process" otter-browser.exe
See the cmd file in the package.
Edit: This also has the Window Title fix enabled, need the updated Qt5 libs