Speed Editor Function loss since update

I recently updated to DR 17.2 and along with that the update for the Speed Editor.
Since then, I have lost the mark functionality on the keyboard when using the sync bin which very frustrating as I use this feature a lot.
Anyone got any ideas?

Thanks in advance

Could I ask somone who owns a speed editor to try this for me so I can assertain if this is just a loacl problem or a bug. I'm using a two camera plus audio track timeline synced and editing within sync bin with the speed editor on the cut page. I try to place a mark with the Audio Level/Mark key but it does not responed.