ZeroHello can be updated, why other sites can't be updated (showing 5 nodes)

### Step 1: Please describe your environment

* ZeroNet version: 0.7.1
* Operating system: Win10 1909
* Web browser: Firefox 70
* Tor status: not available
* Opened port: no
* Special configuration: _/

### Step 2: Describe the problem:
Trackers has turned on the proxy, how can I still not update the node?

#### Steps to reproduce:

1. _____
2. _____
3. _____

#### Observed Results:

* What happened? This could be a screenshot, a description, log output (you can send log/debug.log file to hello@zeronet.io if necessary), etc.

#### Expected Results:

* What did you expect to happen?

该 issue 提到 Windows 10 上使用 Firefox 70 的 ZeroNet 0.7.1，没有 Tor，也没有开放端口，但没有提供具体的文件、测试、日志或可复现步骤。首先，在检查 tracker proxy 和五个节点的状态的同时，复现 ZeroHello 与其他站点之间的差异。完成的标准是确定更新失败的原因，并验证预期的更新行为。

由索引模型根据 Issue 内容生成。