I can confirm that 10.13.2 does not always solve the problem. My lab upgraded from Sierra to High Sierra (directly to 10.13.2) and EndNote has become unusable for several users in the manner described above.
I can confirm that 10.13.2 does not always solve the problem. My lab upgraded from Sierra to High Sierra (directly to 10.13.2) and EndNote has become unusable for several users in the manner described above.