Umm, OK Mayór. If the clothing manufacturers were free to order buttons from abroad, as they had been doing for years, and simply failed to do so, for no good reason, well I guess we will have to chalk it up to SOS (Sudden Onset Stupidity), and not the sanctions.
Are you sure you want to go with that? I know that the prospect of the FSB pulling out your fingernails makes you quick to absolve Putin of, well any and everything. But in this case your explanation makes the leadership of the clothing manufacturers out to be buffoons, who "forgot" to order buttons. The implausibility of that explanation focuses attention on what you want the West to ignore.
Maybe you ought to just stick to posting tales about how the Russians are famous for their strict compliance with international norms.
The reason is an inflatory shock where the ruble lost half ty value for a short period of time. It is not the case anymore.