Currently I have no idea how to reproduce this as it happens randomly but quite frequently. My current work around is to restart editor until the issue is solved or add a delay node between Event Begin Play and the affected nodes.
Issue:
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Spawn Actor from Class
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Set Material
If the above two nodes are connected to Event Begin Play, it will sometimes not run at all (not spawning actor or changing material) until I add delay node in between or restart the editor a few times.
Affected on:
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Mobile Preview
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Mobile Device (iOS)
Is this some sort of limitation on how fast mobile devices can initialize objects? Is delay a must between Event Begin Play and those 2 nodes??