Just ran into an issue where after loop recording multiple takes (like 10), then using Undo to remove Take 10 only, Sonar performed an Undo of all 10 takes in one command and removed the Re-do possibility.

Next time just click on the x on the left side of the take you want to delete!

brconflict
Just ran into an issue where after loop recording multiple takes (like 10), then using Undo to remove Take 10 only, Sonar performed an Undo of all 10 takes in one command and removed the Re-do possibility.

Confirmed that Loop recording in Sonar only sets one level in the Undo History.  Performing Undo removed all takes, but they were recoverable using Edit>Redo recording (Shift-Ctrl-Z).
 

 
I verified that 2 other DAWs that I use also only set one level in their Undo History when Loop recording.
 
-- Ron