pivot table cells format trouble

dear participants,

anyone faced the problem when collapsing/expanding pivot table rows/columns - text becomes white and can only be read if selecting the cell and change the text colour???

I expand the row data, put a filter etc. and text that is contained in rows turns white...I redo my last step and everything is OK, I can select the column with rows and change the colour but when I go expanding my row data again the same thing happens

pls advise

will be very grateful

great thanks! I just found out that the sheet had conditional formatting settings, and that is why some fields came out "blank"

thanks a lot anyway!!