[0.7.0] z.show frequently fails to render tables or charts

[Xiaohui Liu]

Hi,

After deploying 0.7.0, z.show often fails to render tables and charts. When
that happens, if we refresh the page, the tables and charts will show up.

In browser side, we observed this error:

TypeError: Cannot read property 'type' of undefined
    at cells (handsonHelper.js:57)
    at y.Core.getCellMeta (vendor.ee876a1abacbe752.js:325)
    at y.Core._getColWidthFromSettings (vendor.ee876a1abacbe752.js:325)
    at getColWidth (vendor.ee876a1abacbe752.js:325)
    at x.getColumnWidth (vendor.ee876a1abacbe752.js:324)
    at Object.columnWidthFn (vendor.ee876a1abacbe752.js:324)
    at e._getColumnWidth (vendor.ee876a1abacbe752.js:322)
    at e.calculate (vendor.ee876a1abacbe752.js:322)
    at new e (vendor.ee876a1abacbe752.js:322)
    at s.createColumnsCalculator (vendor.ee876a1abacbe752.js:324)
(anonymous) @ vendor.ee876a1abacbe752.js:37
handsonHelper.js:57

Is there any way to solve this problem?

Regards
Xiaohui