小程序扫码首次进入指定页面后，页面白屏，为什么？

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小程序扫码首次进入指定页面后，页面白屏，为什么？After the Mini Program scans the code and enters the specified page for the first time, the page is blank, why?

After wechat enters the coupon collecting page by scanning the small program code, it will enter the page for the first time, and the page will be blank. Just enter it again. When entering the white screen for the first time, there is no error in the front-end console and the back-end log. There will be page loading in Onshow of the page, but the page is not loaded in the white screen state. It is inferred that there is no applet life cycle of the page in the white screen state. What are the possible reasons?

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