Metabones released firmware update V1.6 for Canon EF to Micro Four Thirds Smart Adapter and Speed Booster.

Those are the Benefits and improvements:
– Fixed iris click noise issue while zooming a variable aperture zoom lens. Fixed OM-D E-M1 depth-of-field preview button inoperative issue.
– Improved connection reliability if lens is attached to adapter after camera is powered on.
– Fixed an intermittent pincushion distortion issue on Panasonic bodies.
– Fixed IBIS on OM-D series of Olympus cameras.
– Fixed lens hot swapping with passive MFT mount of BMCC.

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Thanks Ter. for sharing this!