Bug in Time-Picker?

I get the attached error-message as soon as I incorporate the time-picker in my application.

It works perfectly fine, but shows the error “(Type Error): Cannot read proeprty ‘querySelector’ of null” in upper right corner.

Is it me misusing the component or is it a bug I should report?
17528451.png

I get the same since a few days. But not every time I access it

You are right Chris, not always. But actually more often than not.