Why does Blazor Components sometimes does not detect the code-behind typed in the partial class?

𝖶𝗁𝗒𝗐𝗁𝖾𝗇𝖨𝖼𝗋𝖾𝖺𝗍𝖾𝖺𝗉𝖺𝗋𝗍𝗂𝖺𝗅𝖼𝗅𝖺𝗌𝗌𝗈𝖿𝗍𝗁𝖾𝖼𝗈𝗆𝗉𝗈𝗇𝖾𝗇𝗍, 𝗇𝗈𝗐𝗆𝗒𝖼𝗈𝗆𝗉𝗈𝗇𝖾𝗇𝗍𝖽𝗈𝖾𝗌𝗇𝗈𝗍𝖽𝖾𝗍𝖾𝖼𝗍𝗍𝗁𝖾𝖼𝗈𝖽𝖾-𝖻𝖾𝗁𝗂𝗇𝖽?

𝖠𝗌𝗒𝗈𝗎𝖼𝖺𝗇𝗌𝖾𝖾, 𝗂𝗇𝗍𝗁𝖾𝖼𝗈𝗆𝗉𝗈𝗇𝖾𝗇𝗍, 𝗂𝗇𝗍𝗁𝖾𝗈𝗇𝖼𝗅𝗂𝖼𝗄() 𝖾𝗏𝖾𝗇𝗍, 𝗂𝗍𝖽𝗈𝖾𝗌𝗇𝗈𝗍𝖽𝖾𝗍𝖾𝖼𝗍𝗍𝗁𝖾𝖲𝗁𝗈𝗐𝖬𝖾𝗌𝗌𝖺𝗀𝖾() 𝗏𝗈𝗂𝖽.𝖨𝗍𝗅𝗈𝗈𝗄𝗌𝖾𝗏𝖾𝗋𝗒𝗍𝗁𝗂𝗇𝗀𝗂𝗍'𝗌𝗈𝗄𝖻𝗎𝗍𝗈𝗇𝗅𝗒𝖼𝗅𝗈𝗌𝗂𝗇𝗀𝗍𝗁𝖾𝖿𝗂𝗅𝖾𝗌𝖺𝗇𝖽𝗈𝗉𝖾𝗇𝗂𝗇𝗀𝗂𝗍𝖺𝗀𝖺𝗂𝗇, 𝗂𝗍𝗐𝗈𝗋𝗄𝗌... 𝖨𝗐𝗈𝗎𝗅𝖽𝗅𝗂𝗄𝖾𝗍𝗈𝗄𝗇𝗈𝗐𝖺𝗍𝖿𝗂𝗋𝗌𝗍𝗐𝗁𝗒𝗂𝗌𝗁𝖺𝗉𝗉𝖾𝗇𝗂𝗇𝗀𝗍𝗁𝗂𝗌𝗐𝗂𝗍𝗁𝖡𝗅𝖺𝗓𝗈𝗋𝖢𝗈𝗆𝗉𝗈𝗇𝖾𝗇𝗍𝗌?

Is 𝗍𝗁𝖾𝗋𝖾𝖺𝖿𝗂𝗑𝖿𝗈𝗋𝗍𝗁𝗂𝗌, 𝖺𝗉𝖺𝗍𝖼𝗁𝗈𝗋𝗐𝗁𝖺𝗍𝖾𝗏𝖾𝗋?

I'm using NET 8

Thanks!