Issue vue create new app instance for no reason and not destroy the old one

[Lamvtse]

Hi all,

I am currently having an issue with the incorrect signaling between two systems. For some unknown reason, each time I go to a specific page, there is a new Vue app instance will be created and the old one still exists, at this point, the signal control on the old app instances still running and sends incorrect information to another system.

I tried to find the reason and some solutions but do not have anything yet.
I also tried to run my application in prod mode and this issue still happened

Please let me know if you guys have any advice or ideas about this issue.

I'm using Vue v2.6.11, Vue-router v3.4.3, Vuex v3.1.3