Issues on iOS 26.1 beta & RC

[zcutlip]

I'm seeing a number of issues on iOS 26.1 beta & RC with my wireguard tunnel in Passepartout. I thought the issues were a problem with iOS, but I've tried with the same configuration profile with the official Wireguard iOS app and the below issues seem to resolve.

Issues include:

• tunnel frequently stalling, blocking all traffic, needs to be disconnected/reconnected
  • this seems to happen most often after a change of network, e.g., Wifi to cellular, or change from one SSID to another
• trouble AirPlaying to Apple TV (air play to other devices seems to work fine)
• trouble using CarPlay over wired connection
• Some 1st party apps, specifically News, have trouble when tunnel is connected; even when tunnel is otherwise working fine.

I'm curious if others have had similar issues? Happy to provide logs or other supporting data.

[keeshux]

Hey, just in time, and yes, there have been reports recently. Before any further questions, do you have "Enforce tunnel" enabled in the profile?

[keeshux]

Other than that, there are two infos that would immensely help:

• Do the issues go away if you disable the "Cross-platform WireGuard" toggle in Preferences > Advanced?
• Looking up the most recent TestFlight build that is not affected by these issues

Specifically, these are the beta builds to test. This should go from newer to older to find "the most recent build that works":

• 3.5.17 (3943)
• 3.5.16 (3942)
• 3.5.15 (3940)
• 3.5.14 (3936)
• 3.5.13 (3933)
• 3.5.12 (3924)
• 3.5.11 (3919)
• 3.5.9 (3908)

I would do it myself, but, unfortunately, I don't encounter any issues with WireGuard.

Thanks a lot!

[zcutlip]

do you have "Enforce tunnel" enabled in the profile?

Yes I do

Do the issues go away if you disable the "Cross-platform WireGuard" toggle in Preferences > Advanced?

I tried it briefly and it didn't seem to fix things, but I will experiment further and see if there is any improvement at all

Looking up the most recent TestFlight build that is not affected by these issues

Okay, great I'll give those a try and see if I can find the build where things work/don't work

I can also share my wireguard config, without keys, if it would help

[keeshux]

Let me know if disabling “Enforce tunnel” fixes you issues before disabling the cross platform toggle.

[drexample]

It still might be related to either WG or an SDK with which Apple makes apps compile lately (which would prevent it from happening on unupdated wireguard, I'd guess?) - I and working on a freshly compiled WG-based app too (not passepartout), but some of my users are experiencing this too and rather painfully. I, somehow, entirely unable to replicate it, though.

[keeshux]

I found the official WireGuardKit code to have a few issues with regard to reachability checks.

Check this out, NEObservablePath in particular: http://github.com/partout-io/partout/pull/257

[zcutlip]

Interesting

[zcutlip]

Let me know if disabling “Enforce tunnel” fixes you issues before disabling the cross platform toggle.

I tried the disabling the cross platform toggle first thing this morning when trying to use CarPlay during my drive, and it didn't see to have an effect, so I turned it back on.

I've been having a hard time reproducing some of the issues while I work today:

• AirPlay to Apple TV has been working fine, where before it would never work with the tunnel connected
• It's hard to reproduce the connection stalling out (requiring restart of the tunnel) due to the 10 minute limitation of the Test Flight build. This probablem has always been intermittent and happens at irregular intervals.

If I can get issues to start reproducing again, the next thing I'll try is to turn off "enforce tunnel"

[zcutlip]

I was able to reproduce the issue with CarPlay, and disabling "enforce tunnel" allowed it to work without completely deactivating the tunnel.

Build: 3.5.18 (3947)

I'll continue to try to reproduce the related issues described above, plus try to identify the build number where things changed.

[keeshux]

We're treating different issues here. CarPlay and AirPlay may indeed be affected by "Enforce tunnel", and that's mentioned in the footer ("it may disrupt connectivity"). Also Personal Hotspot. That's fine.

Let's focus on the stuck tunnel on network change instead. I encourage you to test 3.5.19 (3950) from TestFlight (uploading it now), because it should fix the issue quite thoroughly. Don't bother to test older betas. Make sure to ENABLE the "Cross-platform WireGuard" toggle during the tests.

Thanks and let me know!

[zcutlip]

I'm looking forward to trying the latest build, thank you!

One problem, though, is it's difficult to reproduce some of these issues with the 10-minute time limit in the Test Flight bulid. Sof of the issues are intermittent and happen at irregular interverals, so they often don't reproduce before the timeout elapses.

Regarding CarPlay and AirPlay, I'm happy to follow up with a separate issues for those. They definitely weren't a problem before iOS 26.1

[keeshux]

You can avoid the 10 minutes limit by avoiding paid features. What are you using? DNS?

Again, "Enforce tunnel" may break CarPlay and AirPlay. I don't think it's about iOS 26.

[zcutlip]

You can avoid the 10 minutes limit by avoiding paid features.

I need the on-demand module. I've noticed the problem is exacerbated by moving between networks and especially with the tunnel disconnecting/reconnecting on network change. Sometimes it can work fine for a long time, much longer than 10 minutes, before stalling again.

Again, "Enforce tunnel" may break CarPlay and AirPlay. I don't think it's about iOS 26.

It's been working perfectly for me for a very long time (I've been using passepartout since before the redesign), including iOS 26.0. All of the issues in the original post (carplay, airplay, tunnel stalling, Apple News breakage) started precisely with the iOS 26.1 developer beta.

I'm not sure if I'm able to be of continued assistance. I hate that I wasn't able to provide actionable information. I'll continue the try out the app store releases, and I look foward to seeing how things evolve. Please reach out if I can provide any data, logs, configs, etc. I'm excited to help if possible!

[keeshux]

Thank you Zachary, useful info. By the way, the 3.5.19 patch is on its way to the App Store and should fix cross-platform roaming, it's a matter of a few days.