The results column is blank after the annotation is complete

[zengyu1221]

Describe the bug
I set a set of tags containing two options. When annotating, select one of them and submit successfully. The value of Annotation results column is equal to []
label code:

<View>
<Header value="..."/>
<Text name="result" value="$description"/>
<Header value="..."/>
<Labels name="lbl" toName="result">
<Label value="1" alias="yes" showAlias="true" background="#18e60a"/>
<Label value="2" alias="no" showAlias="true" background="#e6200a"/>
</Labels>
</View>

To Reproduce
Steps to reproduce the behavior:

Screenshots

Environment (please complete the following information):

• OS: [CentOS7.6 running in Docker]
• Label Studio Version [1.12.0]

Additional context
Add any other context about the problem here.

[makseq]

are you sure you make spans on your text with these labels?

[zengyu1221]

I have set the tags to two values, 1 and 2. When I annotate, I choose 1. I expect it to be displayed in the 'Annotation results' column, but instead, I get []. Here is the address I'm using for testing: http://8.140.16.183:8080.