This shouldn't come as a surprise to anyone following Telegram's business practices. "Jurisdiction hopping" seems to be standard procedure for them, and it was only a matter of time for a jurisdiction to lose its patience with that.

Curious to see what's next, i.e. if they'll start an engineering game of cat and mouse with Spanish ISPs by e.g. using domain fronting (not sure if the big cloud providers still allow that in particular) or something else.