I have a found a bug that I can easily reproduce with the "Tools\Options\Text Editor\Basic\VB Specific\Enable highlighting of references and keywords".

Basically, if I open a project and I would adjust that setting, without doing anything before, such as opening additional .vb files in the environment, it would work. As soon as I start adding additional .vb files in the environment and try to adjust that setting after, it crashes. Basically, it closes by itself and I can restart it after. Only the application crashes. So, all the rest of the Windows is ok.