For these kinds of issues, please check whether the behavior also occurs on mobile web, which it does in this case, and tag MobileFrontend .

I can confirm that this issue exists on mobile wikipedia. IMHO The problem causes {{{{ #invoke:Chart | bar chart\n| height = 700\n| width = 800\n| stack = 1\n| group 1 = 1173 : 1804 : 1708 : 1060 : 187\n| group 2 = 141 : 562 : 661 : 600 : 118\n| group 3 = 221 : 427 : 579 : 371 : 80\n| group 4 = 2089 : 4767 : 9291 : 10076 : 1692\n| group 5 = 12033 : 22850 : 34918 : 27805 : 13632\n| group 6 = 10253 : 29618 : 66133 : 91622 : 43202\n| group 7 = 17198 : 75703 : 305141 : 783520 : 290296\n| group 8 = 4225 : 30940 : 225862 : 1855720 : 837412\n| group 9 = 3009 : 11220 : 34137 : 93404 : 61514\n| group 10 = 139 : 407 : 1787 : 16209 : 535499\n| colors = violet : indigo : lightblue : darkgreen : lightgreen : yellow : orange : red : purple : black\n| group names = Featured articles : Featured lists : A-class articles : Good articles : B-class articles : C-class articles : Start-class articles : Stub articles : Lists : Unassessed articles and lists\n| x legends = Top : High : Medium : Low : ???\n}}}} on https://en.wikipedia.org/wiki/English_Wikipedia. The chart template is not mobile friendly (it's wider than the screen size), because of that you can scroll articles horizontally.

This is a local wiki issue and the problem is tracked in 2 pages on the talk page: https://en.m.wikipedia.org/wiki/Module_talk:Chart

• https://en.wikipedia.org/wiki/Module_talk:Chart?useskin=vector#Mobile_wikipedia_bar_chart_presentation_terrible
• https://en.wikipedia.org/wiki/Module_talk:Chart?useskin=vector#Add_noresize_class_alongside_chart_for_better_mobile_support