TYPO3 Core

Using IE11 if you have two tabs both with RTEs in Backend.
And now switch from the first to the second and back to the first, it will be impossible to Modify any fields in that tab.

The issue seems to be the following:

  77 //
  78 // Hotfix display tab-panes always to prevent RTE initialisation problems
  79 //
  80 .tab-content {
  81         > .tab-pane {
  82                 display: block;
  83                 height: 0;
  84                 overflow: hidden;
  85                 &.active {
  86                         height: auto;
  87                         overflow: visible;
  88                 }
  89         }
  90 }

After some tries I found out that it would work fine if not only height: 0 is used but also width: 0 and width: auto