NFT list from one wallet remains when connecting another wallet

This issue is directly realted to #199 . It appears that there are artifacts cached in the browser and React/Node is not clearing information quickly enough.

Initial Notes:

• I have 2 wallets on L2: Android Smart Wallet and MetaMask
• Due to testing, I switch between them some times to check various items

Repro:

1. Connect Android Wallet to loopring.io and unlock
2. Go to L2 Wallet > My NFT
   OBSERVE: I can view the NFTs from my Smart Wallet
3. Click wallet address in top-right to disconnect
4. Connect MetaMask wallet and unlock

Expected:
Once unlocked, I am presented with the My NFT page and the NFTs from my MetaMask wallet

Actual:
Once unlocked, I am presented with the My NFT page, but it is populated with NFTs from my Smart Wallet

Notes:

• Some times, the old NFT list stays on screen indefinitely until you click something or refresh the page. Most often you see the old NFT list for a second or two before it refreshes itself.
• I swap between these two wallets somewhat often, just for testing and checking various things.
• Even if I refresh the page inbetween Step 3 and Step 4, I can still see the NFTs from my Android Wallet after connecting MetaMask.
• The only way to avoid this is to CTRL+F5 refresh (clear cookies/cache) or close the browser entirely before connecting MetaMask

GIF Example of this occurring

Slightly new behavior:

I am consistently seeing the previous wallet's list on-screen for longer than I was before. My video above shows a split second, but now it's more like 2 seconds. I will try to get more video and post.