Fix animated text attachment positioning

Views/UIKit/AnimatedAttachmentLabel.swift

@@ -45,10 +45,8 @@ final class AnimatedAttachmentLabel: UILabel, EmojiInsertable {
             else { return }
 
             animatedAttachment.imageView.frame = imageBounds
-
             animatedAttachment.imageView.image = animatedAttachment.image
             animatedAttachment.imageView.contentMode = .scaleAspectFit
-            animatedAttachment.imageView.center.y = center.y
             animatedAttachment.imageView.sd_setImage(with: animatedAttachment.imageURL)
 
             if animatedAttachment.imageView.superview != self {

Views/UIKit/AnimatedTextAttachment.swift

@@ -11,7 +11,15 @@ final class AnimatedTextAttachment: NSTextAttachment {
     override func image(forBounds imageBounds: CGRect,
                         textContainer: NSTextContainer?,
                         characterIndex charIndex: Int) -> UIImage? {
-        self.imageBounds = imageBounds
+        if let textContainer = textContainer,
+           let textContainerImageBounds = textContainer.layoutManager?.boundingRect(
+            forGlyphRange: NSRange(location: charIndex, length: 1),
+            in: textContainer),
+           textContainerImageBounds != .zero {
+            self.imageBounds = textContainerImageBounds
+        } else {
+            self.imageBounds = imageBounds
+        }
 
         return nil // rendered by AnimatingLayoutManager or AnimatedAttachmentLabel
     }