[C#]: 下载进度不匹配

[minecraft-DYL]

检查项 / Checklist

• 我已在 Issues 页面 中搜索，确认了这一 Bug 未被提交过 / I have searched the Issues page and confirmed that this bug has not been reported yet.
• 我确认只是全部选中而没有仔细确认就直接提交了这个 Issue，并且同意这个 Issue 可以直接被关闭 / I confirm that I checked all boxes without carefully reading them, and agree that this issue may be closed directly.
• 我确认正在使用当前更新分支的最新版 PCL CE，若不是，此 Issue 可能会被直接关闭（更新方式：启动器 设置-关于-软件更新 检查更新，或在 Releases 页面下载） / I confirm that I am using the latest PCL CE version on the current update channel. If not, this issue may be closed directly. To update, check for updates in Settings → About → Updates, or download the latest version from the Releases page.
• 我确认会详细描述我所遇到的问题，并附上日志和截图，而不是随便填点东西敷衍了事 / I will describe the problem in detail, attach logs and screenshots, and avoid submitting vague or incomplete information.

描述 / Description

下载管理页总进度和各个任务的进度不匹配
例如下载MOD：
总进度：90%
下载任务进度：50%
在下载管理按钮处的进度条会显示总进度

重现步骤 / Steps to Reproduce

下载任意mod，最好是比较大的，可能触发（例如铁砧工艺）

日志与附件 / Logs & Attachments

Launch-2026-9-13-111103225.log
Launch-2026-9-14-182016171.log
Launch-2026-9-15-190239231.log
Launch-2026-9-16-182335504.log
Launch-2026-9-18-183424409.log
Launch-2026-9-18-231205376.log
Launch-2026-9-19-094143229.log
Launch-2026-9-20-183024985.log
Launch-2026-9-9-180506559.log
Launch-2026-9-10-194909873.log
Launch-2026-9-11-182140223.log
Launch-2026-9-11-221021178.log
Launch-2026-9-12-111343063.log
Launch-2026-9-12-164037558.log

[Pigeon0v0]

因为之前你添加过其他任务吧

[minecraft-DYL]

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