• VSCode Version: 1.19.3
• OS Version: win 10 1709

Steps to Reproduce:

1. Have a decently big project
2. F1 + run build task + tsc watch
3. Hit CTRL+S
4. Try to scroll any window while the issue list rolls (in my case it is a big issue list)
5. Any editor interaction gets UI blocks while parsing is taking place. Since parsing may occur frequently, this can become annoying.

EDIT:

• Might be related to having a big issue list?

Does this issue occur when all extensions are disabled?: Yes