Certificate error in the iOS app

Description:

I am trying to connect to a local RocketChat server using the iOS app on my phone. The server is behind a VPN and uses Nginx as a reverse proxy. I have valid self-signed certificates installed on my server. I have no issues with the Android app; after adding the certificate, I was able to connect. However, I'm having trouble with the iPhone. I suspect it's an issue with the iOS app. Could you please check?

Environment Information:

• Rocket.Chat Server Version: 5.0.6
• Rocket.Chat App Version: 4.38.0
• Device Name: Iphone 14 Pro Max
• OS Version:

Steps to reproduce:

1. Have the web server in front of Rocket.Chat require client certificates, and "Apply Your Certificate" on the initial screen of the iOS App 4.38.0.
2. Enter your workspace URL
3. Click Connect

Expected behavior:

App sends client certificate with the request, server permits it, connection succeeds.

Actual behavior:

tcpdump on web server target side shows request coming in without client certificate, it requires one so the connection fails, app reports "Oops! An SSL error has occurred and a secure connection to the server cannot be made."

Additional context:

Reproduce with Rocket.Chat Server 5.0.6, iOS App 4.38.0, an iPhone, VPN, Nginx, and a required client certificate. Trace the iOS connection flow after “Apply Your Certificate”; done means the request includes the client certificate, the server permits the connection, and the SSL error no longer occurs.