Note: I cannot find the dupe, so comment if you found one.

Minecraft quotation mark is not the same as some text documents quotation mark (such as Word). This seems like a minor/unnecessary issue but it's actually kinda major. Some people (including me) use and edit a lot of commands. Of course, it's much easier to edit commands in text documents than in Minecraft itself. And since the quotation mark is also use a lot in commands and the most popular text documents is Word, this make edit commands with quotation mark very annoying.

Step to reproduce:
Step 1: Open Microsoft Word and type (but not copy): /summon minecraft:enderman ~ ~1 ~ {carriedBlockState:{Name:"minecraft:bedrock"}}
Step 2: Copy that text, then in the Minecraft world, press "T" and then press "Ctrl+V", then press "Enter" -> Note that the command didn't success.
Step 3: Now press "T" again, then type (but not copy) that text above; or press the up arrow key, then remove the old (") and add back the ("), then click "Enter" -> Note that the command successed.

I also tested some other text documents and found out that the same thing happened to PowerPoint (although clearly PowerPoint is not a text document), but it doesn't work with Excel and Notepad.

Edit: I researched further and found that the Microsoft Word quotation mark is the "right double quotation mark" and the Minecraft quotation mark is the normal "quotation mark".