Russia looks set to remove trademark protection and has already removed patent protection from JetBrains (along with basically the entire west) - could be related to why now rather than earlier: https://www.washingtonpost.com/business/2022/03/09/russia-al...
It's not about trademarks, patents or licenses. JetBrains made a public statement against the war in Ukraine, now they fear for the safety of the employees left in Russia.
Being in a rough neighborhood, "founded in Prague, Czech Republic, 22 years ago" their position about Russia's "special military operation" is more than the usual vapid posturing by entities with little or no skin in the game, but you would think they would have thought about their vulnerable employees still in Russia before publicizing that position. Makes me wonder what else they might do purely for "political" reasons; another reason I'll be sticking with my FOSS development tools.
Here is the repository for IntelliJ [1]. It has an Apache 2.0 license. That is - by any definition - FOSS.
It’s clear you have some form of agenda with “political reasons” mentioned. Why not stop being coy and spell it out?