When you delete existing widgets when having a Time Series, the TS bar grows horizontally but without the histogram

When you have a Time Series widget added and you try to add some others widgets from scratch

Tip: if you resize the page, it 'solves' the problem.
I feel this issue has already been reported, but in any case you have reported with the new "handlers" thing but happens in production right now.
Possible duplicate of #12123
While developing another issue, we ran into this and the reason seems that autostyle is enabled by default, but the model lacks some color information so it breaks.
It breaks in function _generateFillGradients of chart.js
Closing it because, as @rjimenezda mentioned, it is duplicated with https://github.com/CartoDB/cartodb/issues/12123. 馃拫 thanks @josecruz
Duplicated: #12655
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Tip: if you resize the page, it 'solves' the problem.