Sepolia LOOOONG Pending

So basically I tried to deploy my small contract, the same contract I deployed yesterday.

//SPDX-License-Identifier: GPL-3.0

pragma solidity >=0.8.2 <0.9.0;

contract SmartContractDeployment {
    uint256 number; 

    event Log(string message);

    receive() external payable {}

    function store(uint256 num) public {
        emit Log("new number stored");
        number = num;

    function retrieve() public view returns (uint256){
        return number;

But now I receive this error

And I have no idea why this happened. Before that I tried to send transaction using ESP32 to that deployed contract but it’s also pending.

Now I’m wondering if this is a fault from my side or just a system fault
Are they more reliable alternative testnets?

it looks like the issue is related to that ‘replacement transaction underpriced’