iOs doen't allow to shut down the app

[wclr]

The problem is decribed in the article
After iOs 12.2:

PWAs have a new lifecycle and on most normal situations, the state of your app will be saved and restored between sessions, but there is no way to kill the PWA and restart it from scratch.

That is actually quite a nasty problem when you need to unload the app and to launch fresh one again. You just can't -)

There is not very consistent workaround: exit the app, and try to load some other "PWA" or even just some site in Safari. Often it leads to unloading target "PWA" from memory. Though I believe it depends on available resources.