When completing the code, there is a significant delay, and the measured delay can reach up to 0.5 seconds.

## Environment data
`dotnet --info` output:7.0.10
VS Code version:1.83.1
C# Extension version:v2.6.24

## Expected behavior
I hope the delay reduce to like the 1.25.0
## Actual behavior
Like the title, there is a big delay for completing the code. If I use the 1.25.0(one year ago)version, the delay beneath the 0.1s.