code gives unexpected output when working with eeprom - arduino

Question

I am trying to read EEPROM first and then write particular data to EEPROM. I am expecting previous data from EEPROM at first but it prints the data I am trying to write to EEPROM. But if I add a delay between the read and write everything works as expected. I am using an ESP32( Arduino framework) clocked at 240 Mhz. I am very suspicious about the clock frequency. I think this issue happens because the instruction speed of the controller is much higher than the baud rate. Am I right?
#include <Arduino.h>
#include <EEPROM.h>
#define config_ver "pppp"
void saveconfig();
typedef struct {
char version[10];
char ssid[10];
char pass[10];
int settings;
} configuration_type;
configuration_type configuration = {config_ver,"lol","dk",50};
void setup() {
Serial.begin(115200);
EEPROM.begin(128);
for(int i = 0; i <= 50; i++) {
Serial.print((char)EEPROM.read(i)); // "pppp" is printed instead of values already in eeprom.
}
Serial.println("\n");
//delay(10000); // delay
saveconfig(); // "pppp" is about to write to epprom
for(int i = 0; i <= 50; i++) {
Serial.print((char)EEPROM.read(i));
}
Serial.println("\n");
}
void loop() {
}
void saveconfig() {
Serial.println("################Saving configuration################!!");
for(int i = 0; i < sizeof(configuration); i++) {
char data = *((char*)&configuration + i);
EEPROM.write(i,data);
}
EEPROM.commit();
}
Output:
pppp␀␀␀␀␀␀lol␀␀␀␀␀␀␀dk␀␀␀␀␀␀␀␀␀␀2␀␀␀␀␀␀␀␀␀␀␀␀␀␀␀2␀␀
################Saving configuration################!!
pppp␀␀␀␀␀␀lol␀␀␀␀␀␀␀dk␀␀␀␀␀␀␀␀␀␀2␀␀␀␀␀␀␀␀␀␀␀␀␀␀␀2␀␀
Output after adding delay:
pppp␀␀␀␀␀␀lol␀␀␀␀␀␀␀dk␀␀␀␀␀␀␀␀␀␀2␀␀␀␀␀␀␀␀␀␀␀␀␀␀␀2␀␀
################Saving configuration################!!
aaaa␀␀␀␀␀␀lol␀␀␀␀␀␀␀dk␀␀␀␀␀␀␀␀␀␀2␀␀␀␀␀␀␀␀␀␀␀␀␀␀␀2␀␀