Unsaved tab content disappears and reappears

[Duct-Ape]

Type: Bug

Azure Data Studio version: azuredatastudio 1.45.0 (8eff468, 2023-07-24T18:22:12.106Z)
OS version: Windows_NT x64 10.0.19044
Restricted Mode: Yes
Preview Features: Enabled
Modes: Restricted
Extensions: none

Steps to reproduce

1. Open a new query (Ctrl+N)
2. Write content in the newly opened tab
   
3. Close Azure Data Studio without saving
4. Open a file with Azure Data Studio from outside the application
   
5. The unsaved tab's content is gone
   
6. Open a new query (Ctrl+N)
7. The newly opened tab contains the contents of the now empty tab
   

This will also happen with more than one tab. Creating three tabs in step 1 will produce three empty tabs in step 5. It will also allow you to open up to three tabs in step 6, which will all get filled with the contents from their respective tabs from step 1.

Expected result

At step 5, the tab should still contain it's original content.
At step 7, the new tab should be empty.

System Info

Item	Value
CPUs	Intel(R) Core(TM) i5-9500 CPU @ 3.00GHz (6 x 3000)
GPU Status	2d_canvas: enabled canvas_oop_rasterization: disabled_off 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 video_decode: enabled video_encode: enabled vulkan: disabled_off webgl: enabled webgl2: enabled webgpu: enabled
Load (avg)	undefined
Memory (System)	31.92GB (25.52GB free)
Process Argv	C:\Users\Me\Desktop\external_file.sql
Screen Reader	no
VM	0%