Good to hear it worked for you! Apparently, I was told that moving an app to work on IPv6 takes a lot of work on the back end so we may not see this happening anytime soon on the MLBB app.
A lot of network providers are moving to IPv6 as IPv4 is getting full (as I was told) and a lot of apps haven't migrated to IPv6 yet so those apps won't work unless APN protocol is changed back to IPv4 :)