Setting sync is not working

[Shams-Raju]

Issue Type: Bug

There are many extensions, that's why setting sync is not working perfectly.

Extension version: 3.4.3
VS Code version: Code 1.55.2 (3c4e3df9e89829dce27b7b5c24508306b151f30d, 2021-04-13T09:35:57.887Z)
OS version: Windows_NT x64 10.0.18363

System Info

Item	Value
CPUs	AMD Ryzen 3 3200G with Radeon Vega Graphics (4 x 3600)
GPU Status	2d_canvas: enabled gpu_compositing: enabled multiple_raster_threads: enabled_on oop_rasterization: enabled opengl: enabled_on protected_video_decode: enabled rasterization: enabled skia_renderer: enabled_on video_decode: enabled vulkan: disabled_off webgl: enabled webgl2: enabled
Load (avg)	undefined
Memory (System)	5.95GB (2.13GB free)
Process Argv	--crash-reporter-id ed18585c-abc2-430e-bb68-622bc862a56f
Screen Reader	no
VM	0%

A/B Experiments

vsliv368cf:30146710
vsreu685:30147344
python383cf:30185419
pythonvspyt678:30270856
vspor879:30202332
vspor708:30202333
vspor363:30204092
vstry914:30276682
pythonvsdeb440:30248342
pythonvsded773:30248341
pythonvspyt875:30259475
pythonvspyt639:30281910
pythontb:30283811
wslfolderdoc:30282074
vspre833cf:30267465
pythonptprofiler:30281270
vshan820:30276952
pythondataviewer:30285071
vscus158:30286553