So I don't know what it could be, if I add a decoration or an extra texture, it falls off and I can remove any other one in its place, and then it works again.
Upload the project on the forum with reproduction steps to “break” it. If it’s something on your end (either hardware or software issue, or even if you’re doing something wrong) we can help, and if there’s really some bug or limitation in software we can take a look at what causes it.
