@cliffcoggin In settings, didn't you check 'restore previous session on startup'?
Well I had previously twice looked for such a setting to no avail, but have now finally found it. The icon was so faint against the page that always opened that it was difficult to see it. Problem now solved thank you.
@myxor : I don't know if Edge channel should have Waydroid helper. I figured it would be on all channels, but perhaps I'm wrong about that. Anyway, you found the app by switching channels. Happy exploring!
@nero355 The HTML5/WebApp feature for Clickable to create UT app is quite literally putting an application in its own browser window, the only difference is the lack of NodeJS on the backend.
Thank you all for your suggestions. The Problem is that downloading with ghostcloud doesn't work on Xperia X at the moment. I still try to find out what the problem is.