Queries/Procedures with DECOMPRESS frequently return defaulted result erroneously

[LouisGordon]

Type: Bug

1. Create a table with a [Content] VARBINARY(MAX) NULL column
2. Insert data into the table and using the built in COMPRESS function for the [Content] column
3. Query the value using the DECOMPRESS function ex: SELECT DECOMPRESS(Content) FROM dbo.MyTable
4. Witness that sometimes this works, and frequently it does not with a value of 0x (empty varbinary). Interestingly not null, which might be a clue.

If you add additional columns to the table with data for the query, those are also returned as NULL incorrectly when this happens, even though the data is there.

Azure Data Studio version: azuredatastudio 1.50.0 (49c73a8, 2024-11-17T22:25:36.863Z)
OS version: Darwin arm64 24.1.0
Restricted Mode: No
Preview Features: Enabled
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System Info

Item	Value
CPUs	Apple M4 Pro (14 x 2400)
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 webgl: enabled webgl2: enabled webgpu: enabled webnn: disabled_off
Load (avg)	3, 4, 5
Memory (System)	48.00GB (0.06GB free)
Process Argv
Screen Reader	no
VM	0%

Extensions (4)

Extension	Author (truncated)	Version
profiler	Mic	0.14.0
schema-compare	Mic	1.21.0
sql-database-projects	Mic	1.4.3
powershell	ms-	2024.3.2