System Information
Operating system: Windows-10-10.0.19041-SP0 64 Bits
Graphics card: GeForce RTX 2060/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 461.72

Blender Version
Broken: version: 2.92.0, branch: master, commit date: 2021-02-24 16:25, hash: rB02948a2cab44
Broken: version: 2.83.12
Worked: Do not know.

Short description of error
When deleting vertex groups while filtering with the search bar it continues down the unfiltered list.
Example:

X
Y
X.001

If you filter for "X" you get this result:

X
X.001

When you delete "X.001" It will select "Y" instead of "X".

Exact steps for others to reproduce the error
1: select the default cube.
2: create these three vertex groups in order:

X
Y
X.001

3: expand the search option in the vertex group section
4: Type "X" in the search box
5: Select "X.001" and press the remove button.
6: You should now notice that nothing is selected. Remove the "X" from the search box to view all vertex groups.
7: You can now see that the "Y" vertex group is selected.