Is it cause our app to be banned?

[dawud-tan]

an app may not download executable code (e.g. dex, JAR, .so files) from a source other than Google Play.

[Mohilvadia]

i don't think so as when you upload your app to google play store your app is checked thoroughly what does is contain and how it is working. By launching new app doesn't make your app malicious and code in that app will work accordingly. so don't worry