Fix WalletConnect / MetaMask connection + network switching issues (React dApps)

Summary:
If users can’t connect their wallet, switch networks, or sign a transaction, they bounce. Fast.
I fix WalletConnect + MetaMask + EVM network switching issues properly (root cause, not temporary hacks).

What I’ll Fix

Wallet / Connection

WalletConnect not connecting (mobile + desktop)

MetaMask connect failures / “already processing” / infinite loading

Random disconnects, stale sessions, account mismatch

Wrong address shown / state not updating

Network Switching

switchNetwork fails / chain not supported

Wrong chainId / broken addEthereumChain

Network guard logic blocks users incorrectly

RPC/provider config causing broken reads & writes

What You Get

Clean fix in your codebase (PR or patch)

Stable connect + reconnect behavior

Proper error handling (human messages, not raw errors)

Notes explaining what broke + what I changed

Supported Stack

React / Next.js • Ethers.js / Web3.js • WalletConnect • MetaMask
Ethereum • BSC • Polygon • Base • other EVM chains