1) Occurence of square bracket List syntax, e.g. , [var1], [var1, var2], etc., causes formatter to fully stop functioning in any way (including the case when line is commented). Similar Map syntax `[key:value]` doesn't cause such problem. This is extremely annoying and forces to avoid using this elegant syntax.
2) Formatting doesn't remove redundant spaces, while according to Java formatting settings, it should.
3) if (condition) action one-liners causes next line to be idented one tab further
E.g. try to format this code in a new file:
if (true) break
4) Formatting doesn't insert empty lines where is should (again, according to Java formatting settings)