If you are experiencing the issue of text disappearing when typing in Outlook, here are some steps you can take to try to fix the issue:

1. Check your Outlook version: Make sure you are using the latest version of Outlook. If not, update to the latest version.

2. Restart Outlook: Close Outlook and reopen it. This may resolve the issue.

3. Disable add-ins: Try disabling any add-ins you have installed in Outlook. Add-ins can sometimes cause issues with the program.

4. Check your font settings: Ensure that the font settings you are using in Outlook are compatible with the program. Try changing the font to a standard font such as Arial or Times New Roman.

5. Repair Outlook: You can try to repair Outlook by going to Control Panel > Programs > Programs and Features > Microsoft Office > Change > Repair.

6. Create a new Outlook profile: Sometimes creating a new Outlook profile can help resolve the issue. To create a new profile, go to Control Panel > Mail > Show Profiles > Add.

If none of these solutions work, you may need to contact Microsoft support for further assistance.