Quick capture shows null if only content is defined

I would like to use the quick capture functionality to capture short text.
And I do so with logseq://x-callback-url/quickCapture?content=<my text>"

However, the resulting capture looks like this:

**07:27** [[quick capture]]: <my text> null

Notice the null that appears because I did not specify a url and title. I think they should just be empty text instead of null.