No, it shouldn't be a problem, provided you take care to completely clean both the dropout tab and the inside of the stay. To avoid a repeat of this problem, sink plenty of brass into the stay. Lay a bead along the margin of the domed stay end, then use the torch to draw the molten brass into the stay. Repeat until you've filled the stay end (you can tell by how quickly the stay cools after you remove the flame; if it cools quickly, there's air under that part. If it stays glowing, there's brass).