#5837 Disappearing Navigation Bar

[MarlowBrown]

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• I have read the README and CONTRIBUTING documents
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Contributor checklist

• My commits are rebased on the latest main branch
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• My contribution is fully baked and is ready to be merged as is
• I have tested my contribution on these devices:

• iPhone 16, iOS 18.2
• iPad Pro 13-inch M4, iOS 18.2

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Description

This proposal fixes #5837 by provided a workaround the navigation bar disappearing. Exploring the codebase, there is no location where the navigation bar title view is hidden; however, as explained in the code comment in this PRs only commit, I am confident that this is a UIKit bug. This PR is a workaround until that UIKit bug is patched.

[sashaweiss-signal]

I'm not wild about adding this workaround.

I can't trivially reproduce the issue on iOS 18.3 by rotating to landscape and back, so clearly something unreliable is going on. There's already a lot of unstable and hacky things already around Signal's nav bars, and I'm not inclined to add yet another instance without understanding the root cause. I worry that this will create more subtle problems down the line.