Tente isso -
- Pressione Alt + F11
- Pressione Ctrl + G
- Digite
ActiveSheet.UsedRange
e pressione Enter - Saia do editor do VBA e salve novamente a pasta de trabalho
Breve explicação de por que funciona ( Fonte )
Every Worksheet object has a UsedRange property that returns a Range object representing the area of a worksheet that is being used. The UsedRange property represents the area described by the farthest upper-left and farthest lower-right nonempty cells in a worksheet and includes all cells in between.
Você está forçando o Excel a "mapear novamente" o usedrange
.