We were on Fibre Max, which supposedly runs at up to 900Mbps, but we averaged around 600Mbps.

Suddenly today I'm getting below 90Mbps, and I don't know why.

On the Spark web site it shows my plan is now on Fibre 100 (up to 100Mbps), but on the Android app it says I'm on Fibre Max (up to 900Mbps).

The web site has instructions to get the mobile app and run it's self check on the fibre connection.  When I try that it just says "Something went wrong. Please try again later".

What is going on and why would my plan suddenly change?