First Startup very slow Android Build UE5

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Hello,

I made an app on android and when I install it on my phone to test I realize that the splash popup of unreal is there for at least one minute, then my game starts.
No crashes just slow, also at the start I have an intro video in a widget UI with a media player, that one is very laggy.
I was scared my app was running very slow but then reopening it solved everything, all the loading was fast and no lag at all even in the video.
I tried this multiple times reinstalling the app and it was always only the first time…

Is there a way to fix this for the first startup?

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Did you ever find the reason for this?

I am facing this issue too. First startup is super slow, even on blank level with minimal rendering settings.

The subsequent starts are faster varying around 5 sec.

I think there is some setting causing this but I have not been able to pin it down. Maybe it could be Use Shared Material Cache checkbox in packaging section. I will try and comment back.