UserAgent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/72.0.3608.4 Safari/537.36
Platform: 11151.59.0 (Official Build) stable-channel kevin

Example URL:

Steps to reproduce the problem:
1. Connect Chromebook to Wi-Fi with IPv6 (tried both SLAAC and DHCPv6, with custom compiled dhcp6c client and tweaked ip6tables rule)
2. Confirm that Chromebook has a valid IPv6 address
3. Open an Android app and connect to IPv6

What is the expected behavior?
Connection successful

What went wrong?
It doesn't work. 

$ sudo tcpdump -nvvi arcbr0 ip6
No output at all when connection is being made.

Did this work before? N/A 

Chrome version: 71.0.3578.94  Channel: stable
OS Version: 71.0.3578.94
Flash Version: 

This would mean Android apps won't work in IPv6 only environments.