Range.Formula not set correctly when filters are applied on sheet

Question

I am using C# for excel add in development and a strange issue is occurring. I am populating the formulas inside the cells as follows:
private void SetFormula(Range range, string[,] formulaMatrix)
range.Formula = formulaMatrix;
This code works fine if no filter is there in the sheet. But if any column (in the given range) has a filter set, then many rows are duplicated with the same value. So for instance, say that formula matrix contains the following:
[0,0] = "A"
[1,0] = "B"
[2,0] = "C"
[3,0] = "D"
[4,0] = "E"
Then, from 3rd row onwards, the value set is "B" only. (specifically 3rd because the next filtered row is 3rd in number)
I searched online about the problem but couldn't find anything.

Answer 1

Hi Harsh,
Base on my test in VS2013 with Excel 2013, it works fine.
These are steps:
Code:
private void button2_Click(object sender, EventArgs e)
string[,] s=new string[4,1];
s[0,0]="A";
s[1,0]="B";
s[2,0]="C";
s[3,0]="D";
SetFormula(this.get_Range("A1", "A4"), s);
private void SetFormula(Excel.Range range, string[,] formulaMatrix)
range.Formula = formulaMatrix;
Click the button to trigger that event, works fine
Clear content (A1:A4)
Apply filter to column A (Data=>Filter)
Click the button to trigger that event, works fine
Could you share a simple project that can reproduce that issue on the OneDrive? 
We will check it.
Best Regards
Starain
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