in spring configuration file create new <bean> element. In 'class' attribute value type the class short name. Put the cursor somewhere in the middle of the name and press Ctrl-Alt-Space. In the appeared list select the correct class by Enter or mouse.
----> the class full name is substituted, but with 1 symbol cut.
It seems that the n+1 symbol is removed where n is the class short name length.
If the cursor is placed in the end of the name to complete (after last symbol), no problems occur

<bean id="_b1" class="bens.B1"></bean> <!--beans.B1 - 3d symbol is removed -->
<bean id="_mtb" class="beans.MyTetBean"></bean> <!--beans.MyTestBean - 11th symbol is removed -->

<bean id="myservice" class="services.impl.MyServiceImpl"></bean> <!--services.impls.MyServiceImpl - 14th symbol is removed -->


Issue was resolved