Permanence of strange .tex file

[Rich Shepard]

Here's another new experience for me. When I kill the lyx process there
remains a file, for example lyxpreviewN17596.tex, which shows up in the
process list as 'latex lyxpreviewN17596.tex' and consumes 100% of the CPUs
most of the time.

Root cannot find this file anywhere, and it persists after I close lyx, even
when I did not open the compiled PDF or look at a preview within lyx.

I kill the process but haven't seen this before and would like to understand
what might be behind this behavior.

Regards,

Rich