How to reproduce:
1. Before you open a project, add the commandline option {{-enable-memoryprofiler-callstacks}} (via the three dot menu), then open it. (alternatively, when taking a snapshot from a Player, start it with that commandline option.
2. Open the Memory Profiler and take a snapshot (make sure you use a version that has MemLabel support (see comments))
3. Open the snapshot and go to the All Of Memory page.
4. Find the group of items under Native > Unity Subsystem > Unrooted > Unrooted.

Expected result: The allocations are not split up into their respective memory labels (multiple sub categories).
Actual result: The allocations are not split up by their respective memory labels.

Reproducible on: WIndows 11, Nintendo Switch
Not reproducible on: No other environment tested

Note: The commandline option was only added in 6000.3. For previous versions, the precompiler directive ENABLE_DEBUG_GFXALLOCATION_CALLSTACK_INFO must be set to 1 when compiling Unity.