I'd guess that at Yandex they did not believe Russian leaders to make a mistake this bad. They were as surprised by the open attack as the western companies that lost their investments in Russia.

Finland was always intended to be the weak member of EU when it comes to dealing with RU. There was the historical evidence of Finlandizierung to support this belief. Somehow Putin managed the impossible and united people from extreme right to far left in supporting Finland to join the NATO.

Very recently Finland (actually private company Fennovoima) cancelled the joint Fennovoima & Rosatom project to build a new nuclear power plant in Finland. This decision to cut Rosatom off the project was on a much larger economical scale and was widely greeted with welcome.