I have this problem where the maps in Canyon / Platform are missing blocks. They are not just invisible because my car falls through.
I loaded the same map into the editor and it doesn't have any issues. The regular Canyon campaign maps work fine as well.
The Canyon platform titlepack has not been updated for the latest game version yet (for whatever reason). However, you can download all the tracks on MX where they have been updated unofficially: https://tm.mania-exchange.com/tracksear ... e=platform