Update: a couple months ago I get a new pc and the official deck builder stopped working. I tried troubleshooting but the result was that it no longer exported HD scans. I've been trying to find a deck builder tool online, but again so far all of them are low quality.

im not sure if you are encountering a bug or not, but theyve worked on all my playtests and i use it a lot. could you record a video and show me what you mean?

you should only be able to see the hiden zone of your colour. you could be viewing the table as host or spectator, which is like a grey or white colour? you must pick red or blue before you play.

It seems that the hidden part of your tables doesn't work?