When going invisible, whether it be from the dive or from dodging, your weapon will be put in a "resting state," similar to the one where you've been afk/ not doing anything for a while. It doesn't seem to be consistent, but it happens much more often when using the dive.
Here is a video of it happening:
[url]https://youtu.be/uozRanUMfqE[/url]
Its not very visible in the video, because of the color palette of the Dreaming City area that I captured the bug in, but at the end you can see the "resting" animation without invis.
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That's because you're not running, you're gliding This sometimes happens, but once you're walking normally again, everything works as it should