In general, I agree with you. No obligation to transfer on your property. With that said, I’m sure there is an agreement in place for the transit, and the reason they provided to stop it is EU sanctions. I don’t think that reason is technically correct in this case, as it is a transfer from Russia to Russia. Maybe I’m wrong, although I’ve read recently they are allowing the transit through there again. Now if they go ahead and declare war, totally get transit stops then.
Doesn't matter!
You have the right, at any time, to retract the permission you gave me to carry my goods across your border! E.g., Canadians do not have some "inherent, inalienable right" to enter into the U.S. and traipse across our country, just because "it's a short-cut!"
Doesn't matter whether it's from Russia to Russia or from Russia to the Moon!
What part of "Git off'n mah prop'rty!" don't you understand?
Russia has been conveniencing itself at Lithuania's expense. Lithuania has hitherto granted Russia the privilege (not "right!") to traverse its territory. That privilege can be rescinded at any time - for example, when Russia launches an unprovoked war of conquest against a neighboring state.
This forces Russia to "take the long way." Poor Russia now has to take a longer route to its exclave! This is the World's Smallest Violin!
Regards,