How to prevent hiding of my draft comment when I switch temporarily to a different app?

[David Pautler]

While I was drafting a comment in a bug, I switched a few times to another browser to get some info and come back. The first ~3 times I did this, my draft was visible when I returned. But after that, there was no visible sign of my draft, not even as a hidden comment that could be re-expanded.

I selected the reply button to the same comment as my draft had been for, and my draft suddenly appeared.

If this is working as designed, is there a setting to disable this so that draft comments are never hidden? Note that the browser was not relaunched during this; instead the jira page decided I didn't need to see my draft anymore.