Both crashes happened when clicking in the Courses's LH panel. The first was clicking on a green dot that indicates completion, the second was clicking on a heading to expand the TOC.
0602.LogosLogs.Martin.20180322-073037.zip
8625.LogosLogs.Martin.20180322-073819.zip
BTW. I was also seeing the TOC opening/expanding to the wrong place once a course was selected. It expanded to the section after the one that I am currently working on, effectively skipping the unwatched video component. This is reminiscent of behaviour a few months ago.
I was using NT221.