I’m having what appears to be the same issue with my own Android builds. It appears to be irrespective of device, given that you’re running a OnePlus, and I’m having this issue with an LG V20 and Oculus Quest.
Annoyingly enough, logcat was the only way to find these errors, I wasn’t able to find any crash logs or anything else generated by UE. However, I don’t always get far enough to see these errors, and UE will crash before it gets logged. Difficult to tell as there’s a lot of noise and nonsense to filter in logcat.
I’m attempting to re-create this issue in a fresh project with nothing so far. Will update this post/thread as I learn more.
Update: I set up a fairly elaborate UI containing most of the key features I had. No crash, nothing.
I have several options from here, that are all terrible.
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Shove the entire project into a UE bug report.
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Go hunting BP by BP, trial and error, removing errant BP’s one at a time, if they even show up in the log. (Sometimes the log shows nothing from UE before it crashes.)
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Continue building the test project and see if I can stumble into the bug.
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Learn the entire ■■■■ codebase of UE.
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Ditch Android/Quest support.