Assembler and error squiggles don't update reliably

[Niko-O]

Steps to reproduce:

• Open https://ripes.me/, open the editor (which should be empty)
• Type ble t1, t2, target and wait. It will not show any error squiggles, but it also won't show any executable code.
• Type a colon (:), such that the text is now ble t1, t2, target:, and wait. It will show an error squiggle across the entire line. Hovering your mouse over it tells you Stray ':' in line.
• Hit backspace, enter and type target:, such that the text is now ble t1, t2, target in line 1 and target: in line 2, and wait. It will still show the same error squiggle with the same mouse hover text, and no executable code.
• Hit enter and type nop in the third line, and wait. It will assemble properly and show the "current instruction" highlighting.

What I expect:
At every step, after waiting for a moment, the error squiggle and executable code should correctly reflect whether the current source code is valid, and if not, what exactly the problem is. It should never show outdated information.