[Autocomplete] not working on some iPhones/versions of iOS

[Taakn]

Problem description

Autocomplete dropdown does not appear on some versions of iOS + Safari. We've tested on multiple iPhone/iOS versions and bug is inconsistent. Bug does not appear with iOS emulators but it has appeared on iPhone 6+ and 6s devices. We've tested on multiple versions of Material-UI and it has appeared on 0.16.7 and up.

Link to minimal working code that reproduces the issue

Bug appears with the sample code on the documentation website

Versions

• Material-UI: 0.16.7 and up
• React:
• Browser: Safari 10

[mbrookes]

@Taakn I can't see anything obvious in the 0.16.7 release notes that would impact this: https://github.com/callemall/material-ui/releases/tag/v0.16.7

git bisect around that release may be the way to go.

[Taakn]

So I went through some extensive testing to try and figure out exactly what versions of iOS or iPhones were affected. Here are my findings:

I went to an Apple Store and tested there on all the iPhone models I could find (5, 6 and 7 & S/Plus). I am confirming that the autocomplete does not work on any devices on 0.17.2.

I tested on one particular iPhone 6s and I am confirming that autocomplete does not work on any versions 0.16.0 and up (haven't tested lower), and does not work on any browsers (Safari, Chrome and Firefox).

Looks like the popup appears but is not positioned underneath the input. It might be related to #3638

[mbrookes]

@taakan I just tested AutoComplete on the docs site on 5s, and it seems fine. I'm sure if the problem was that widespread since 0.16.7 we'd have heard before now...

[Taakn]

Once again it worked on another iPhone 6 (regular, not S or Plus). So the bug seems to depend on some parameter I haven't identfied yet. I've spent several hours this afternoon finding different iPhones and going to an Apple Store to test, so up to you if you want to dismiss it like that

[mbrookes]

so up to you if you want to dismiss it like that

@Taakn No need for the snark.; that is a good way to get your issue dismissed.

Once again it worked on another iPhone 6

At no point have you mentioned that, only that it works on emulators. In fact, you specifically mentioned that it didn't work on the iPhone 6 in the Apple Store.

What version of iOS is the working iPhone 6 running? Have you considered that this might be an iOS 10.3 issue, which would explain why it works on iPhone and not another? That would also explain why it's a recent issue.