Vue Router and VueJS reactivity
What's causing this behaviour is the fact, that the route object is immutable in Vue. Any successful navigation will result in a completely new route object therefore triggering a re-computation of all computed and watched properties. See https://router.vuejs.org/api/#the-route-object for more details.
To solve this you can watch the route object and filter the relevant vs irrelevant changes for you there
watch: { '$route' (to, from) { if(to.path != from.path) { // <- you may need to change this according to your needs! this.relevantRoute = to } }}And then reference the manually set variable in your computed and/or watched properties
templateId() { return parseInt(this.relevantRoute.params.id, 10);},