button save second time

Issue description:

After installing the BeTheme template, I went to Theme Options and successfully changed the logo (save worked correctly).

However, on the next attempt to change any global option (for example, uploading a different logo), saving fails and I get an error in the browser console.

Console error message:

/wp-admin/admin.php?page=be-options#colors-general:1 
An invalid form control with name='betheme[button-animation-time]' is not focusable.

Problematic field (from the DOM):

<input class="mfn-form-control mfn-form-input mfn-sliderbar-value"
 type="number" step="0,1" data-step="0,1" data-unit 
 min="0" max="1" name="betheme[button-animation-time]" 
 value="0.2" placeholder="0.2">

When the issue occurs:

• The first save after installation works correctly.
• Subsequent saves of any settings (even unrelated ones) trigger the error and changes cannot be saved.

Additional notes:

• The problematic input uses step="0,1" (with a comma) instead of 0.1 (with a dot), which seems to cause HTML5 validation issues in most browsers.
• This may be a theme bug or a locale-related formatting issue.

Could you advise how to fix this or provide a patch?