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Copilot goes back to a previous version of the file #254967

Open
@gcxlegaulois

Description

@gcxlegaulois

Type: Bug

When doing a code change, Copilot applies it on an old version of the file, resulting in many changes and broken code.
I was able to replicate this multiple times in a row, even after closing VS Code.

Extension version: 0.28.5
VS Code version: Code 1.101.2 (2901c5a, 2025-06-24T20:27:15.391Z)
OS version: Windows_NT x64 10.0.22621
Modes:

System Info
Item Value
CPUs AMD Ryzen Threadripper PRO 5945WX 12-Cores (24 x 4092)
GPU Status 2d_canvas: enabled
canvas_oop_rasterization: enabled_on
direct_rendering_display_compositor: disabled_off_ok
gpu_compositing: enabled
multiple_raster_threads: enabled_on
opengl: enabled_on
rasterization: enabled
raw_draw: disabled_off_ok
skia_graphite: disabled_off
video_decode: enabled
video_encode: enabled
vulkan: disabled_off
webgl: enabled
webgl2: enabled
webgpu: enabled
webnn: disabled_off
Load (avg) undefined
Memory (System) 127.86GB (75.44GB free)
Process Argv --crash-reporter-id a112bf1b-7754-407b-80be-329ed7990b5f
Screen Reader no
VM 0%
A/B Experiments
vsliv368cf:30146710
vspor879:30202332
vspor708:30202333
vspor363:30204092
pythonvspyt551:31249599
binariesv615:30325510
c4g48928:30535728
azure-dev_surveyone:30548225
962ge761:30959799
h48ei257:31000450
cppperfnew:31000557
dwnewjupyter:31046869
nativeloc1:31344060
5fd0e150:31155592
dwcopilot:31170013
6074i472:31201624
dwoutputs:31242946
customenabled:31248079
9064b325:31222308
copilot_t_ci:31333650
e5gg6876:31282496
pythoneinst12:31285622
4gafe986:31271826
c7cif404:31314491
pythonpulldiag:31343502
996jf627:31283433
pythonrdcb7:31342333
usemplatestapi:31297334
0aa6g176:31307128
7bj51361:31289155
747dc170:31275177
aj953862:31281341
generatesymbolt:31295002
convertfstringf:31295003
j6a0c355:31339598
d2249276:31341129
d7aab740:31338110
usemarketplace:31343026
nesew2to5:31336538
agentclaude:31335815
nes-diff-11:31337487
testaa123cf:31335227
6abeh943:31336334
yijiwantestdri0626-t:31336930
f76d9909:31342392

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