Double clicking scene asset opens the asset file in visual studio

The same t$$anonymous$$ng happens to me but it's like that only with VSCode. When I switched back to VS 2017 everyt$$anonymous$$ng works fine. Also, it happens to be only on Unity 2019.2.2f1.

There is a option in Edit -> Preferences where you can change your external editor.

I was having the same issue on Windows, Unity 2019.3.0a12 and Visual Studio Code. I went into Unity preferences and changed the external script editor setting to: "Open by file extension". Scenes open normally now on double click. The first time I double clicked a script, Windows asked me what I would like edit .cs files with. I selected VSCode to always open these types of files. Now everyt$$anonymous$$ng is back to normal. Was working fine previously on Unity 2017/2018 so not sure what changed.

for any of you who may still be experiencing t$$anonymous$$s problem, the solution for me was to open the package manager and update the vs code editor package to the latest version.