[how to use same break for xls and pdf]

Hi guys, I'm using jaspersoft studio 6.12.2 version, I'm working on a report that I want it to be exported in pdf, DocX and xlsX.

I made a group and put a break in its footer. Pdf and docX are well exported, the problem is with the xls export.
What I tried : 

• Break before in the group header 

Result  ==> Footer in not exported in xls

• Break after in group footer 

Result ==> data is perfectly shown, but after every sheet there's an empty sheet 

• Adding a second group header or group footer 

Result ==> pdf and docX won't work perfectly 

Anyone can help please ?? 
ps: Sorry for my bad English