My entire answer was deleted when I went to edit the question

I have not used this editor much (maybe 2-3 answers), but I discovered a fatal flaw: when in markdown mode, my answer is wiped out a few seconds after I click edit on the question (which happens inline due to me having 2k+ rep). When the answer is in WSIWYG mode, it simply wipes out what I have in code fences.

So far, this has only happened to me when I was answering the question Can we make syntax highlighting easier?. In this case I was able to recover by refreshing the page to access the autosave. I posted my answer there and the same thing happens to me when I am editing the answer then click to edit the question. It's not caused by an extension and there are no console errors.