Giggle, nah you didn't understand.
There was a bad thing happening that only worked for any items "stackable". The staff knows about that, they fixed it. But there are still many items in the game that are a "left over" of this bad happening. Silver coins are stackable, so...maybe...you know...that is what I was trying to say.
If they are involved in this bad happening and the staff knows about it, maybe that could be the reason for the restriction.
If you're talking about a recent patch, then no, silver gasha coins weren't included in that process.