It is a common pattern to move the canvas using the middle mouse or right mouse drag.
Having to use both keyboard (space) and mouse to move canvas requires additional cognitive effort.
- keep the current solution + add the right (or middle) mouse drag
Note: Some SW uses left mouse drag and dragging the empty space on canvas. This has some drawbacks when canvas is very busy with objects.
Apology - the mentioned issue is of the UX / workflow design character and not a functional bug.
Still I believe it should be categorised here. Or you could have a separate UX / Design issues category.