Why does Blazor Components not detect the code behind typed as a partial class?

𝖶𝗁𝗒, 𝗐𝗁𝖾𝗇𝖨𝖼𝗋𝖾𝖺𝗍𝖾𝖺𝗉𝖺𝗋𝗍𝗂𝖺𝗅𝖼𝗅𝖺𝗌𝗌𝗈𝖿𝗍𝗁𝖾𝖼𝗈𝗆𝗉𝗈𝗇𝖾𝗇𝗍, does the 𝖼𝗈𝗆𝗉𝗈𝗇𝖾𝗇𝗍𝗇𝗈𝗍𝖽𝖾𝗍𝖾𝖼𝗍𝗍𝗁𝖾𝖼𝗈𝖽𝖾𝖻𝖾𝗁𝗂𝗇𝖽?

I𝗇𝗍𝗁𝖾𝖼𝗈𝗆𝗉𝗈𝗇𝖾𝗇𝗍, 𝗂𝗇𝗍𝗁𝖾𝗈𝗇𝖼𝗅𝗂𝖼𝗄()𝖾𝗏𝖾𝗇𝗍, 𝗂𝗍𝖽𝗈𝖾𝗌𝗇𝗈𝗍𝖽𝖾𝗍𝖾𝖼𝗍𝗍𝗁𝖾𝖲𝗁𝗈𝗐𝖬𝖾𝗌𝗌𝖺𝗀𝖾() 𝗏𝗈𝗂𝖽.𝖨𝗍𝗅𝗈𝗈𝗄𝗌𝗈𝗄ay, 𝖻𝗎𝗍𝗈𝗇𝗅𝗒𝖼𝗅𝗈𝗌𝗂𝗇𝗀𝗍𝗁𝖾𝖿𝗂𝗅𝖾𝗌𝖺𝗇𝖽𝗈𝗉𝖾𝗇𝗂𝗇𝗀 them 𝖺𝗀𝖺𝗂𝗇𝗐𝗈𝗋𝗄𝗌.

𝖨𝗐𝗈𝗎𝗅𝖽𝗅𝗂𝗄𝖾𝗍𝗈𝗄𝗇𝗈𝗐 why a Blazor component can't see the change straight away.

Is 𝗍𝗁𝖾𝗋𝖾𝖺𝖿𝗂𝗑𝖿𝗈𝗋𝗍𝗁𝗂𝗌?

I'm using .Net 8.0.

Thanks!