I've almost lost a lot of my work. I accidentally deleted a process which has five data flows connected to it, each with multiple threats assigned to them. When deleting the process, all data flows and corresponding threats were gone! Fortunately, I had saved my model and I was able to reload it...

agreed, and this was a discussion in #640 that is now resolved in favour of the functionality in this bug report
we do not have a fix for this, it may be a feature of AntV/X6 that we can not get round, but planning this for version 2.4 in case it is possible

From all the bugs I've raised yesterday, I personally think this is the most critical one, especially because identified threats/mitigations and documentations are unintentionally, but permanently lost (with no undo possibility).

By the way, the unintentional deletion happened by accidentally clicking on the delete button (I wanted to select the node)

I took a look at this and couldn't reproduce the issue... on linux. I was able to reproduce this on MacOS, and @srcnuzn reported this from Windows. I don't have a solution, but I just thought that was interesting and wanted to add here in case anyone picks this up. 😄

The bug might only be in electron. When using the web app on MacOS, it works as expected for me.

I can not reproduce this myself - the undo works for both electron and web versions
I suggest we get the new drawing package merged into main (sometime this month) and then retest?

@srcnuzn and @lreading could you retest this when you get a chance, using the latest version
I will bump this to version 2.4 for now

Looking good on the main branch on ubuntu 24.04 and macOS sequoia!