Portal: Large attachment error message does not disappear

When a customer creates an issue and wants to attach a file which exceeds the limit, a message appears. If the customer then edits the file to meet the size and attaches the new valid file, the error message does not disappear and it seems as if the new valid attachment is also too big. This is confusing. I know, that the sizes are displayed so that you could verify it yourself but it would be better for the user experience when you would clear the error message.