On the original vim when we repeat a change with . that also contain an find movement the last find that was typed before the repeat is the one used by the motion repeat ;. Before the commit the plugin would have reset the last movement to use the movement contained in the command that was repeated.
To solve this I took a simple approach where I save the last find motion before starting the repeat and then restoring it to its original value after the repeat is over. In order to access the find motion fields from RepeatChangeAction I created getters in MotionGroup for the movement type and character.
modified: src/com/maddyhome/idea/vim/action/change/RepeatChangeAction.java
modified: src/com/maddyhome/idea/vim/group/MotionGroup.java
modified: test/org/jetbrains/plugins/ideavim/action/ChangeActionTest.java