openhab-android: Does not send basic authentication for access to events (reverse proxy)

Actual behaviour

I am using openHAB 2.4 behind a reverse SSL proxy with basic authenticaion. I can see in the Apache logs that the app does not send the credentials for this URL:

“GET /openhab/rest/sitemaps/events/0280f475-925e-463f-9227-202b094a7bd0?sitemap=default&pageid=default HTTP/1.1” 401 442

This does not happen when using the Chrome browser to access the Basic UI.

Expected behaviour

The app should always send the credentials (or react properly to the 401).

Steps to reproduce

1. Set up reverse proxy with Apache and Basic Authentication
2. Point the app to that remote URL

Can you reproduce the issue in demo mode?

No.

Environment data

Client

• Android version: Pie
• Device model: Xiaomi Redmi Note 5
• Stock or customized ROM: Custom, Pixel Experience
• App version : 2.5.0
• Build flavor : Play Store
• Device language: German

Server

• Server version: 2.4.0
• Reverse Proxy: Apache
• Authentication method : Basic Auth

openHAB Cloud

N/A

Logs

App log

There is no such option!?

openHAB Server log

Nothing in that log.

Reverse Proxy log

Insert your reverse proxy error log here.
For nginx: `/var/log/nginx/error.log`
For Apache 2: `/var/log/apache2/error.log`

Nothing in that log.

"GET /openhab/rest/sitemaps/events/0280f475-925e-463f-9227-202b094a7bd0?sitemap=default&pageid=default HTTP/1.1" 401 442