Very frequent connection drops on both Linux desktop and Android

[torvic9]

Basic Info

Desktop: Linux 6.16.y, Arch Linux, nym-vpn-client and nym-vpnd version 1.16.0
Android: GrapheneOS, Nym from F-Droid

Issue

On above systems, I encounter very frequent connection drops, like 2 or 3 per minute, which makes Nym completely unusable.

While examining the (desktop) vpnd logs, I see the following error appear:

2025-10-05T14:53:46.101523Z  WARN nym_vpn_lib::bandwidth_controller: Error: error querying remaining bandwidth
Caused by: Internal error: there was an issue with the REST request: error sending request for url (http://10.1.0.1:51830/v1/bandwidth/version)

and also

2025-10-05T14:53:51.180290Z ERROR nym_vpn_lib::tunnel_state_machine::tunnel_monitor: Task manager quit with error: gateway [XXX] is erroring out

Not sure whether these warnings/errors are related to the issue, but I hope it helps.

[ryosoftware]

About the OP logs... Nym is connecting to our servers using http instead of using https? how is that possible?

[marcdbz]

Hi the disconnects are being addressed with the new Elderberry and Fig releases.

Regarding HTTP:

• It is an internal service that is only available to that peer on the private IP range for Wireguard on the gateway
• Tt works in the same way as Amazon Web Services EC2 instance metadata endpoint: https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/instancedata-data-retrieval.html

HTTPS is not necessary because the HTTP connection goes over the Wireguard tunnel (already encrypted) to query an endpoint that authenticates the user based on:

• they have a Wireguard connection, therefore they are a peer
• the client's peer address is verifiable from the other end of the socket connection

[pronebird]

We've been working on improving the stability and hopefully many issues should go away with the coming release.

[rachyandco]

can you check the latest Android?

• https://github.com/nymtech/nym-vpn-client/releases/tag/nym-vpn-android-v2.3.0

(f-droid is one version behind still)

For linux, can you try 1.18. it has a lot of improvements, but still some issues switching networks or resuming from sleep (we are working on those)

• https://github.com/nymtech/nym-vpn-client/releases/tag/nym-vpn-core-v1.18.0
• https://github.com/nymtech/nym-vpn-client/releases/tag/nym-vpn-app-v1.18.0

can you try and give us your feedback? much appreciated

[Arcterus]

I'm not sure if this is exactly the same issue (since generally Nym has been fine for me), but on a very slow network, I attempted to download a file, and Nym kept disconnecting and attempting to reconnect (causing the download to fail). I eventually tested disabling the hardened memory allocator (GrapheneOS), and it seemed to fix the issue. The disconnects were easily reproducible by reenabling the hardened memory allocator.

Note that this was on the latest (stable) release.

EDIT: I also got a crash very quickly when enabling MTE. Native code debugging seems like it may be required as well as I was having connection drops when it was off (I didn't test this as much, so it may have simply connected to a few bad servers).