Whilst using Office for Mac Excel or Word it stops typing in the document or spreadsheet (it still types if I search in help). I have checked that the keyboard is ok by checking connectivity, batteries and bluetooth and thats all still good. The only way I can get it to work again is to restart the pc but this is not practical after only working on the program for 5 minutes! I have recently upgraded to Yosemite so don't know if thats interfering somehow!
iMac (21.5-inch, Late 2012), OS X Yosemite (10.10)