FMOD::Sound error on certain iOS devices on iOS 10 prevents music from being played

We are getting reports of music not working in our game from users on certain older iOS devices (perhaps 32 bit ones?) running iOS 10. It occurs with any music, but not sound effects. It doesn't seem to matter whether the music comes from an asset bundle or not, the error happens with both. We're using Load Type: Streaming, Compression Format: Vorbis. We've had reports of the problem with versions built using Unity 5.3.6f1, and still with the latest 5.4.2f1.

The exact error message in the log (which we have from a beta tester with the problem) is:
Error: Cannot create FMOD::Sound instance for resource sharedassets1.resource, (An error occured that wasn't supposed to. Contact support. )

The devices we've heard about it happening on are:
iPad 2
iPad 3
iPhone 5C

There's a thread on this topic in the Audio forum, and a closed bug report as well:
https://forum.unity3d.com/threads/fmod-sound-instance-for-resource-error-with-asset-bundles.431456/
https://issuetracker.unity3d.com/issues/fmod-sound-instance-for-resource-error

 

Submitted an issue and it got closed as a duplicate of this one, which Google couldn't find for some reason:

https://issuetracker.unity3d.com/is...-does-not-play-on-some-devices-running-ios-10