Externalize and Show Generated buttons are missing from VFX Inspector when project is restarted

1. In the project create a new VFX Graph
2. Select Graph and observe its Inspector - it contains Externalize, Select Show Generated buttons
3. Close project
4. Open project
5. Select recently created VFX and observe its Inspector

Actual result - there's no 'Show Generated' and 'Externalize' buttons

 

Note:

• Effect has to be recompiled to show Externalize and Show Generated buttons
• Looks like Show Generated is missing some words. SG equivalent is 'View Generate Shader'