Print problems with Numbers

I did not have another prior PDF to print to check it out. I do not have a second printer to test it out. BUT, I did delete the printer and added it back. VOILA! The document printed with no shading. Why? Because all of the print settings were returned to default. So what setting did I change that produced the shading in empty cells? I wracked my brain and remembered printing a document in which I changed the brightness setting to dark for a specific effect.

My printer is set to use the Last Setting Used so when I printed the spreadsheet, each blank cell was shaded. I was able to test this theory and it reproduce the shading when I changed to brightness level to dark. Wow, a simple fix from a simple adjustment. I hope this helps others learn from my mistake and all of your efforts! Thank you very much.

Thanks for responding. I powered down and restarted all devices earlier, always a simple solution. No change. The problem occurs on all Numbers spreadsheets where cells are blank. I have printed this same document, and others, several times and never had this problem until recently. The only thing that has changed are OS updates. Nothing has changed with the printer driver. To diagnose the problem, I added a character to each of the blank cells and selected white at the text color. The auto shading problem when printing STOPPED. This does not fix the problem. It gives more information to hopefully figure out what's going on. I really don't want to enter a white character in every blank cell on my Numbers documents to prevent auto shading in blank cells. Ideas? Thank you!

SG . . . I'm still hanging here trying to find an answer to this problem. Am I looking in the wrong place? use a different community/topic? Any suggestions would be much appreciated. Very frustrating . . . thanks! Rod

Thank you for the reply.  The problem occurs regardless if I print from the Numbers document or from a PDF file created from it.  The shading does not appear while working in the document or in print preview. I've narrowed the problem to blank cells.  I tried using a white fill background in the blank cells - same result - but when I enter anything in the cell, such as a white character, the auto shading stops. I just tested 5 other Numbers files that I have previously printed without this problem . . . they all have the problem now. What's going on? It renders the Numbers application useless. I need help with this so thank you for trying!

Forgot . . . more information. Each of the cells left blank when printed are a different grayscale shade in each column and row. Hmmm . . . puzzler!