@3daysago - What you are describing sounds similar to another poster’s issue, i.e., when trying to delete the mind map node, the text is deleted, while the “Type something” placeholder is also no longer showing up, giving the appearance that only a line remains, e.g.:

If you have a paid Miro subscription, you can open a Miro support ticket by following these instructions:

https://help.miro.com/hc/en-us/articles/360020185799-How-to-contact-Miro-Support#h_01F010RXA0E1S9C0WFQYX75R6C

I would also suggest that you leave a reply in the following post, or at least subscribe to it, so you have be notified of updates:

https://community.miro.com/ask-the-community-45/investigating-can-t-edit-or-delete-mind-map-nodes-16103

Thank you @Robert Johnson . I’ve done that.