Greetings,
I believe this already a known issue, but I managed to capture Apple's crash report this time and wanted to add it to the knowledge base if it would prove useful in solving the issue. In VW2017 spotlight SP2 I am having a crash event occur every time I attempt to align 2 or more lighting fixture symbols (whether or not the have been converted to instruments). I have experienced this issue over multiple drawings. However, when I opt to "distribute and align" instead of "just align" VW appears to have no issue and completes the action just fine. I have attached the crash report automatically generated by Apple. Thanks!
Align fixture crash.pdf