If it is a synth plugin, you can use the mute button. If you mean bypass an effect to let audio from sub tracks pass straight thru, then currently there is no way to bypass a mapping. A true track bypass button is on the plan along with a wet/dry setting.
If it is because you want to temporarily listen to the audio without the effect, you can use the ‘Unselect map’ in the track menu, and then use undo/redo. Not a perfect solution though, as the plugin will be unloaded and loaded in memory, which can take some time.
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