Microsoft Sudoku not saving my daily challenge results

Sudoku is back!!!

That's exactly my experience too: not always, but frequently an error message appears after opening the app and trying to click on the game (I play the other MS games every morning - Word, Solitaire, Mah Jong - and currently they're working as they should do), "We're having trouble connecting to the Internet" but there's been absolutely no problem except with the Sudoku game. This morning I find my laptop closed itself down overnight, Word, Solitaire, Mah Jong still saved but Sudoku showing 1 game saved from 1/5 (Irregular), 1 game saved from 3/5 (Classic) with all the rest showing as '0/3'. I've had no end of email exchanges with the ZenDesk support team with regular requests for an update from me, or checking whether I've read their latest update, but nothing seems to change except for that random saved status that's only appeared in the past few weeks. First date that remained saved was 16/4, then 28/4 and 29/4 (all three games saved for each), but just single randoms this month so far. The really puzzling factor is that after I played just the 30/4 games (with the rest of the calendar still showing orange, 0/3, for all but those 3 dates), I got the 'Done' button appearing that indicates all games have been successfully completed (and in March I also got the 'Perfect' banner appear - didn't check last month) while at the same time the progress/coins bar does not reflect the same status, and neither does the calendar. I've been advised to make sure I have the latest/updated version of the game loaded, or delete cache/cookies, or uninstall/reinstall or provide some details I can't find, but in other players' cases that doesn't appear to have had any effect so the players' end seems not to be the problem. It's up to the IT team to sort it out at the issue end, isn't it? While I think of it, Sudoku is the only game where the current date always just shows 'Today' - why is that?

Uninstall the Microsoft Sudoku game and reinstall it. After they fixed the issue, I was able to successfully re-play all of the missing March games and all games were saved.

Please don't give up yet. I uninstalled Sudoku and re-installed it. Then I logged in to xBox and was able to go back and play all of the March games, and all of the games were saved and the scores updated. So far in April, I have not had any issues with saving.

I also received many "network error" messages but kept clicking RETRY until the game finally recognized my Internet connection.