To reproduce:
-click on red disk on bottom of LM (see picture) with the translation tool to move the LM
-Hold the vertical movement arrow on the translation tool
-Internal tanks (purple) and panels gold) of LM shift position and become askew within the LM assembly, making the craft crooked
I'm not sure if it's related to the high-part count, or because I'm building this craft in an older laptop, or maybe due to both, although I have moved assemblies with large number of parts before and haven't encountered this issue.