Flash of unstyled content when sorting grid with expanded row expanders

[isglass]

https://bryntum.com/products/grid/examples/nested-grid/

[isglass]

Also when changing theme, https://bryntum.com/products/grid-next/examples/nested-grid-with-chart/

[matsbryntse]

Can't repro locally

[isglass]

Throttle network to repro

[isglass]

Turns out it is only an issue with cache off, unflagging high prio. If we ever get a report on this, we can try the CSS caching approach used in docs fiddles