后台返回单个字符，在真机上显示多了一层双引号，昨夜出现？

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后台返回单个字符，在真机上显示多了一层双引号，昨夜出现？A single character is returned in the background, and there is an extra layer of double quotation marks displayed on the real machine. It appeared last night?

There is no problem with the developer's tools. When I check the console on the real machine, I find that there is an extra layer of double quotation marks on the returned data. I will not appear after reducing the basic library to 2.18.1. There is a problem with the basic library of 2.22, which has seriously affected the production. What is the problem?

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