[BUG] Selection Face By Index For Extrude is always changing

**Describe the bug**
I am trying to make simple extrusion that relies on Index Selection, for face, somewhat when I make changes to the extrude, the index changes. It's very tricky to get right.

**To Reproduce**

Create Cube
Select Face By Index
Extrude
Select Another Face By Index
Extrude
Make changes to Extrude value
Suddenly Extruded area is changing --- NOTE: This does not seem to always happen however I did experience this issue in my video below.

**Expected behavior**
I wish for index not changing much. Is this limitation?

**Screenshots**

**Desktop (please complete the following information):**
- OS: Mac OS Cataline 10.15.6 Beta (19G36e)
- Blender Version 2.83
- Sorcar Version 3.20

**Additional context**
VIDEO: around 5 minutes
https://youtu.be/ig58KHxI81U