Tooltip on top slider shows "null"

[pReya]

What happened?

The top slider tooltip shows "null", no matter what I do. This happens in latest Firefox on macOS.

To Reproduce Bug

1. Open the Web interface
2. Hover over the top slider

Expected Behavior

Should probably show something like "Value/Brightness"

Install Method

Binary from WLED.me

What version of WLED?

0.16.0

Which microcontroller/board are you seeing the problem on?

ESP8266

Relevant log/trace output

Anything else?

No response

Code of Conduct

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