[WA] Shift in the right occurs when inserting gaps at the right edge of the alignment

If we start inserting spaces while standing at the right edge of the alignment, then a shift occurs, and not a transition to the next block.
In the offset state, the current block has incorrect coordinates.

Video for reproducing issue:
https://drive.google.com/file/d/1k5S1c-npuw2S5nYuWBhh64uTqvUgTzBb/view?usp=sharing <https://drive.google.com/file/d/1k5S1c-npuw2S5nYuWBhh64uTqvUgTzBb/view?usp=sharing>