Border rendering exception

as shown in the figure, the first time you enter this page, the left border of textarea goes to the label above.
clipboard.png
UI
clipboard.png

this problem occurs repeatedly, it is not clear what caused it, the width of textarea is not exceeded, and box-sizing:border-box;

is also used. 
.form-group{
    position: relative;
    width: 34.2rem;
    margin: 0 auto;
}
.form-group>textarea{
    display:block;
    width: 100%;
    height: 5.35rem;
    border: 1px solid -sharpccc;
    margin: 0;
    -webkit-box-sizing: border-box;
    box-sizing: border-box;
    font-size: .8rem;
    resize:none;
    outline: none;
}
Css html
Mar.03,2021 
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Document</title>
</head>
<style>
    textarea{
        display:block;
        width: 100%;
        height: 5.35rem;
        border: 1px solid -sharpccc;
        margin: 0;
        -webkit-box-sizing: border-box;
        box-sizing: border-box;
        font-size: .8rem;
        resize:none;
        outline: none;
    }
</style>
<body>
    <textarea name="">
        

    </textarea>
    
</body>
</html>

if everything is normal, what about testing in another environment?

Previous: Angular5 form form validation

Next: Url decoding problem.

css mysql arrays josn react html typescript webpack npm sass R objective-c .net sql-server jquery python-3.x angularjs django angular excel regex iphone ajax linux xml pandas vba spring database wordpress string wpf xcode windows bash postgresql oracle multithreading eclipse list firebase algorithm macos forms image scala visual-studio azure bootstrap spring-boot react-native python-2.7 docker performance function winforms matlab powershell apache dataframe api sqlite numpy rest shell selenium flutter dart maven loops qt swing android-studio csv express file class tensorflow sorting codeigniter perl
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1eaf4af-4800a.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1eaf4af-4800a.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
Need Help?