Fun Expert ... Slow go for me :

g/ng - classical elimination chain of 4

Nice puzzle today! If I have to pause a sudoku, when I come back the green figures are all replaced by a small square image. Any way I can stop this happening please

Agree with spellit! Fun puzzle. I also have the issue with saving or pausing and green squares. On to Babble, in my time zone I start and watch a few finish and return to finish the next morning and everything is as I left it without green squares.

challenging - but solvable with patience