Using WithCalculatedFormulas along WithChunkReading

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I am trying to import records and validate against a rule and export those records which are failed against the validation.

My Import File is of data:

+---------------------------+
|           Phone           |
+---------------------------+
|        9857452563         |
+---------------------------+
|        =+A2+1             |
+---------------------------+
|        =+A3+1             |
+---------------------------+

and so on. I am doing chunkReading

public function chunkSize(): int
{
    return 100;
}

so for up-to 100th records, the formula is being calculated, but not able to calculate the formula for the 101st record onward.
How to resolve this issue?
I hope my question was clear. Thank You!