It must be hard to keep a straight face while saying "we don't know why" with this list of countries. Xiaomi is clearly afraid of the US using its sanction stick to cause problems as they did with Huawei.
> Cuba, Iran, Syria, North Korea, Sudan, and the Crimea region
“I heard you seized a good part of the market share Huawei was forced to cede. It would be a damn shame if something were to happen to you too…”