There has been a recent update to divide the token functionality behavior on Decks into separate functionalities of "Snapping to Grid" and "Having Token Menus & Bubbles". Since this update, I am unable to save these changed settings. When I check the box(es) to tell the Deck to Snap or add Bubbles to it's cards, the settings will not stick. Old Decks will remember their snapping settings, but as soon as I open one to save and edit it, the new (unchecked) default takes over and the Deck's cards will no longer snap at all. Editing other (older) Deck components such as "Playing Face Up" still function without issue, so the problem seems isolated to the new "Behavior" options.
