Encountered the issue today, up to date Steam Windows PC version. Wasn't the case yesterday.
Spark Double, Chrome Mox, and Birds of Paradise don't show up properly in Deck Editor nor in Collection, and it's indescriptible how they show up in game: they remain on the stack even after setting as a permanent; and it's almost impossible to properly interact with them (especially when they start stacking under each other). I don't have an ingame capture but steps to reproduce: put them in a deck and draw them, they show up as a distorted black-and-white Fblthp with a warning triangle sign, that can still be played if you've got the mana (but you can't see their mana cost, and can't see which card it is), and once played remain on the stack and the whole game is a mess after that, planeswalkers don't touch the board and are kept on the stack as well for example, and stack onto each other.