Why is computed value not updated after vuex store update?
It is due to this line:optboxes[index] = {...optboxes[index], printers: printers }.
You are directly setting item with index, which can't be observed by Vue
Try splicing the old item from array and pushing the new one.
You could do this:
Vue.set(optboxesList[index], 'printers', printers )
you need force update
setPrinters(optboxes, optboxId, printers) { const index = this.getIndex(optboxes, optboxId); const newVal = {...optboxes[index], printers: printers } Vue.set(optboxes, index, newVal);},