I don't believe that it is possible to do, even though it would be cool not to lose a battle (along with all consequences such as medals, troops and stars loss) due to technical issues. But think of that, what happens to the player who was attacked? Will he/she wait until the battle resumes? That would mean even more "you're being scouted" and "under attack" messages when trying to log in. However, if this was possible to do without creating worse bugs and flaws to gameplay, it would be great.