Get a different snippet code if just replace not delete the previous one

[yuyully]

Get a different snippet code if just replace not delete the previous one

Environment

• Operating System: Win/Mac/Linux
• JDK version: 11.0.12
• Visual Studio Code version: 1.63.1
• Java extension version: 1.2.0-486

Steps To Reproduce

1. Create an empty java file
2. Type cl and then select snippet for class
3. Select all code lines(don't delete, just do replace) and type 'cl' again > select snippet for class

Current Result

Get different results at step 2 and step 3.
setp2:

step3:

Expected Result

Get a same result at step 2 and step 3

[rgrunber]

This is still an issue. @hopehadfield might be interested.

Note: I've found it easier to reproduce this if you save prior to deleting the content and triggering completion.