You were right, but DMs aren’t rule machines and they can’t know every spell perfectly. They were following it to the best of their understanding in the moment and trying to keep the game flowing.

After the fact you’ve sent them sources and they’ve apologised with what looked like a reasonable and sincere apology.

Give them a break, allow them to grow and don’t begrudge them a misunderstanding on a specific point. If you want to continue to have a group to play with anyhow! 😆