Events not working in Trust wallet or Metamask

Question

Recently, I've developed an Dapp using pure vanilla js and it's contract is currently deployed on etherscan.When someone buys a token, it should increment..Everything's working fine but in the trust wallet(A mobile dapp browser) doesn't seem to call events.. My Dapp is heavily rely on events..

window.addEventListener('load', async() => {
  if (window.ethereum) {
    const web3 = new Web3(window.ethereum);
    try {
        const result = await window.ethereum.enable();
        if (result) {
            return web3;
        }
    } catch (error) {
        er(error)
    }
} else if (window.web3) {
    const web3 = window.web3;
    return web3;
} else {
    er(
        "Non-Ethereum browser detected. You should consider trying MetaMask!"
      );
    }
});


var buy_events = contract.Buy({ buyer: web3.eth.coinbase }, function(error, log) {
if (!error) {
    $.ajax({
        type: 'POST',
        url: 'referral',
        data: {
            buyer: log.args.buyer,
            token: log.args.tokenToTransfer.c[0],
            tokentra: log.args.tokensTransfered.c[0],
            hash: log.transactionHash,
            ref_bal: log.args.referralBal.c[0],
            events_be: log.event,
        }
    });
  }
});
 buy_events.stopWatching();

Solidity

event Buy(
     address indexed buyer,
     uint256 tokensTransfered,
     uint256 tokenToTransfer,
     uint256 referralBal
 );

Ps: I'm using injected web3 by metamask