I have had to temporarily use an old phone running Android 7.1, and installed Home Assistant Companion on it - 2023.1.1-full.
When I try to login with my credentials, it says “Invalid username or password” and the following message is logged in HA:
Logger: homeassistant.components.http.ban
Source: components/http/ban.py:95
Integration: HTTP (documentation, issues)
First occurred: 19:31:12 (2 occurrences)
Last logged: 19:32:13
Login attempt or request with invalid authentication from ipv6 address (ipv6 address). Requested URL: '/auth/login_flow/cf36a6e598fc1a8cb62a9704b3d99f4f'. (Mozilla/5.0 (Linux; Android 7.1.1; E5803 Build/32.4.A.0.160; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/56.0.2924.87 Mobile Safari/537.36 Home Assistant/2023.1.1-3124 (Android 7.1.1; E5803))
Logging in via browser works fine, with the credentials pasted in from the same place.