It sounds like you may have encountered an issue with switching back and forth between Ethereum and Arbitrum. It is important to ensure that you understand the differences between the two platforms and the implications of switching between them. Ethereum is a public blockchain platform, while Arbitrum is a private, permissioned blockchain platform. When switching between the two, it is important to be aware of the differences in the network structure and the implications of the switch on any applications or transactions that are running on either platform. Additionally, it is important to ensure that any data or assets that were transferred between the two platforms are properly transferred and accounted for. If you are experiencing any issues with switching back and forth between Ethereum and Arbitrum, it may be helpful to reach out to the Arbitrum team for assistance.