It’s often I have to double and triple check to verify I copied the code with correct indentation.
I vaguely remember facing that issue once or twice in the past, but certainly not often. It was because the pasted code was too long for its starting point to be easily found in my editor, even if I scrolled up a bit.
If this happens to you often, I wonder: perhaps the code you maintain should be broken into smaller functions?
If I was in that situation again, I think I would simply place a bookmark before pasting and then jump back to the bookmark to indent/dedent the pasted block appropriately.
Edit: Come to think of it, I would have to check and correct it regardless of the language and braces, since confusingly indented code is unwelcome in my commits.