Null values show up as thin bars in Bar chart if you set an axis range including 0.

[kei51e]

If you have null values in y, those show up as thin bars in Bar chart if you set an axis range that includes 0.

Here is a pen.

https://codepen.io/kei51/pen/KKwraMX

It doesn't happen on an older version of Plotly like 1.47.4.

https://codepen.io/kei51/pen/XWJypEO

[etpinard]

Thanks for reporting!

This should have been fixed as part of #4056 unless I'm missing something. @archmoj can you comment?

[archmoj]

Hmm... this demo using #4056 renders OK.
The problem should be caused by another PR in 1.48.0
Investigating...

[archmoj]

Improved bug demo.
This is only a problem in interactive mode. Download PNG works OK (does not show empty bars).
Related to this block:

plotly.js/src/traces/bar/plot.js

Lines 193 to 201 in 8122c21

	function expandToVisible(v, vc) {
	// if it's not in danger of disappearing entirely,
	// round more precisely
	return Math.abs(v - vc) >= 2 ? roundWithLine(v) :
	// but if it's very thin, expand it so it's
	// necessarily visible, even if it might overlap
	// its neighbor
	(v > vc ? Math.ceil(v) : Math.floor(v));
	}

[kei51e]

Thank you very much for the fix!