I have a sheet that has a column which is a kind of “Yes/No” option. It looks up data validity on a lookup table on a second sheet. The lookup options are blank and a tick/check mark (using Wingdings font). Everything worked fine and the dropdown correctly showed blank and tick mark. Now, it crashes when opening since update to 7.5. The only way I can fix it is to go to the lookup table and re-set the font to Wingdings. This now works and stops the crash however the dropdown will not show the correct font and seems to default to a standard font. Naturally, the tick mark is not a tick mark in that font. However when I do select the symbol now shown, it correctly shows the tick mark as designed in the cell.