Lag bug

Issue Type: Bug

This extension provide lag on CSS snippets

Extension version: 1.24.0
VS Code version: Code 1.64.0 (5554b12acf27056905806867f251c859323ff7e9, 2022-02-03T04:22:20.678Z)
OS version: Windows_NT x64 10.0.19043
Restricted Mode: No

System Info

|Item|Value|
|---|---|
|CPUs|Intel(R) Core(TM) i7-9750H CPU @ 2.60GHz (12 x 2592)|
|GPU Status|2d_canvas: enabled
gpu_compositing: enabled
multiple_raster_threads: enabled_on
oop_rasterization: enabled
opengl: enabled_on
rasterization: enabled
skia_renderer: enabled_on
video_decode: enabled
vulkan: disabled_off
webgl: enabled
webgl2: enabled|
|Load (avg)|undefined|
|Memory (System)|15.82GB (5.49GB free)|
|Process Argv|--crash-reporter-id 79e73165-df2f-4e69-9915-0b56a5022a9d|
|Screen Reader|no|
|VM|0%|

A/B Experiments

```
vsliv368cf:30146710
vsreu685:30147344
python383cf:30185419
vspor879:30202332
vspor708:30202333
vspor363:30204092
pythonvspyl392:30425749
pythontb:30283811
pythonptprofiler:30281270
vshan820:30294714
vstes263cf:30335440
pythondataviewer:30285071
vscod805:30301674
pythonvspyt200:30340761
binariesv615:30325510
bridge0708:30335490
bridge0723:30353136
vsaa593:30376534
vsc1dst:30433059
pythonvs932:30410667
wslgetstarted:30433507
vscop940:30404999
vsrem710:30416614

```