.net网站一天偶尔会出现无效的视图状态错误

[奮乧尐圊哖]

最近突然发现网站日志中出现错误“无效的视图状态”
Application_Error 无效的视图状态。
Client IP: xxxxxx
Port: xxxxxx
Referer: xxxxxx.aspx
Path:xxxxxx.aspx
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/78.0.3904.108 Safari/537.36
ViewState: 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...

在网上搜索了一下解决方案
比如：
在页面上加 enableEventValidation="false" viewStateEncryptionMode ="Never"
还有msdn的官方解决方案：https://support.microsoft.com/zh-cn/help/829743/troubleshooting-the-view-state-is-invalid-error-with-asp-net
这些方法都试过，但是问题还是没有解决，还是会偶尔暴露
有没有大神帮忙看看怎么解决这个问题