Set Memory Value (MS) not storing the values correctly

### What Happened?

When storing number with more than 4 digits using the Memory Store (MS) button, the number is not stored correctly. On recalling the stored number using the MR key, only one or two digits are retrieved.
The behavior is inconsistent, sometimes the number of digits retrieved changes.

### Steps to Reproduce

1. Open the calculator
2. Enter the number 12345
3. Press the MS button
4. Press cancel key to clear the display
5. Recall the stored number by pressing MR. The number 12 is displayed instead of 12345.

This issue is observed in a Fedora 42 under KDE Plasma version 6.5.4.

### Expected Behavior

Expected result : the number 12345 displayed
Actual result : the number 12 is displayed

### OS Version

Other Linux

### OS Architecture

amd64 (on most hardwares)

### Session Type

Secure Session (Wayland, This is the default)

### Software Version

Latest release (I have run all updates)

### Log Output

```shell

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### Hardware Info

_No response_