With REAPER 7.40, you might have noticed that playing your projects isn't possible anymore when you're in the OSARA Parameters dialogs.
An OSARA update is ready with a fix. As a bonus, now you can play using Space when focus is on the sliders, you don't need to remember to use Control+Space to hear results anymore.
Control+Space also works to play/pause in those dialogs now, pausing moves your edit cursor, useful if you want to cue up a different part of the project to hear the adjustments you're making in context.
Shout outs to Toni and Jamie for much help with many scary code.