[Vuejs]-Sorting array kills javascript instance on element (i.e. wysiwyg-editor)

Use the key attribute on the v-for loop to reorder the elements, instead of replacing their contents:

From https://v2.vuejs.org/v2/guide/list.html#key:

To give Vue a hint so that it can track each node’s identity, and thus reuse and reorder existing elements, you need to provide a unique key attribute for each item. An ideal value for key would be the unique id of each item.