Thread: loose suppressor?

I have been noticing patterns with the accuracy of my 7mm mag and when going over the rifle noticed if I knock the rifle there is a metallic rattle within the suppressor as though the isolating tube is rattling on the barrel. After a couple of shots once the barrel is warm the rattle goes away and the groups tighten right up (I don't let it get hot).
Wondering if anyone has experienced anything similar. I'll ring the manufacturer tomorrow to have a chat with them and see what's happening
.