Thank you for your reply. I can confirm that I did this, but after translating the menus and syncing them, all languages are displaying the same strings in all languages.
Compare the mega menu in English, and in German for example
English: hidden link
German: hidden link
I cannot upload attachments because your limit is 1MB.
I am not sure on which part you mean, but I see you are using some shortcodes in menu, or maybe some similar addon for mega menu. You will need to go to 2nd language and also adjust it to your need for German, WPML can not know or translate/sync shortcode or custom links. I enable Wocommerce now, but I am not sure which part is same. If so, you will need to manually adjust it further to meet your needs.
- hidden link
If you have further doubts or question on this, please start a new chat and we will be glad to help.
As for the current ticket issue, hope the workaround helps. If yes, I will mark the tickets as escalated to devs, and when there is permanent fix I will update here.