Wind speed shown in m/s at page load and switches to knots when MQTT connects

[thecalle]

Please don't delete these questions! They are asked almost with every issue - answering them as below saves us time from asking them!

First step
Checked settings following the docs about using metric

Describe the bug
Wind metric set to knot, website shows live speed in m/s and immediately when mqtt connects, switches to knots (measurement divided by abut 2)

Link to your website (http://www.iparassiti.com)

Version of the skin you're using

To Reproduce
Steps to reproduce the behavior:

1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

Expected behavior
A clear and concise description of what you expected to happen.

Screenshots
If applicable, add screenshots to help explain your problem.

Device Information (please complete the following information):

• Device: [e.g. desktop, iPhone6]
• OS: [e.g. Windows, Android, iOS]
• Browser [e.g. Chrome, Safari]
• Version [e.g. 22]

Additional context
Add any other context about the problem here. Maybe a potential fix?

HELP WANTED
If you have a fix for this, please submit a pull request against the development branch!