Steps to Reproduce

1. start with a blank sheet, the default font is Calibri
2. select A1, change to "Arial Black"
3. select B1

Current Result

the font family dropdown also shows Arial Black

Expected Result

the font family dropdown shows Calibri

Debug Information

• note. this happens in Chrome all the time; sometimes in Firefox
• note2. also occurs in ZSS 
• after step 2, if you select every cell with the default font, the dropdown always show Arial Black