Wise use of call opcode which works in context of the called contract and changes msg.sender & msg.data during multiple external calls.
Our instance address : 0xC68f749cA7370768189C994980A913515872cC52.
An example we posted in [previous] (https://github.com/ishinu/Phishing-Attack-with-tx.origin) repository named Phishing with tx.origin had similar concept.
If code works in Remix-IDE and not in Rinkeby, possibly it's lacking gas for multiple external calls but not reverting since one call is successfully executing.
- Increase gas :
In metamask,select Advanced Options, and enable *manual* gas fees option and you will be able to manually enter Gas Price (GWEI) and Gas Limit during every new transaction request.