[Bug]: Intermittent error on home page Unable to connect to Sei network

### Describe the bug

After adding Sei Network, there is an intermittent error on the home page or when switching to Sei Network:

`Unable to connect to Sei. Check network connectivity`

Sei network RPC is sei-mainnet.infura.io

### Expected behavior

No error

### Screenshots/Recordings

https://github.com/user-attachments/assets/7ae33f9f-2355-4295-826f-cde9625b1b02

https://github.com/user-attachments/assets/abde5277-485e-4d15-a98f-4fee935545ef

### Steps to reproduce

1. Add Sei network
2. Use the extension for some time
3. Notice error

### Error messages or log output

```shell

```

### Detection stage

During release testing

### Version

13.9.0

### Build type

None

### Browser

Chrome

### Operating system

MacOS

### Hardware wallet

_No response_

### Additional context

_No response_

### Severity

_No response_

Start by reproducing the intermittent failure in the Chrome extension on macOS with Sei configured through sei-mainnet.infura.io, then inspect the home-page and network-switching flows. Capture the relevant error or network logs and determine whether the issue is in RPC connectivity or retry handling; done means switching to Sei and using the home page no longer produces the connection error.

Written by the indexing model from the issue text.