Cloned ionic 3 app web server conflict on ios

I duplicated an existing app to a new one. Change all names & ids from config.xml, package.json, ionic.config.json. Then remove platform and readd ios. Both apps can run separately without any issues but not at the same time. The one which launch last gives “cannot connect to web server” error.

Any idea?

@reedrichards Any suggestion? thx

No idea spontaneously I would say sorry, it’s a bit vague you know. You found nothing on the forum about that?

No. can’t find anything. I suspected that there was a port conflict but not sure how to debug it.
thx anyway.