When adding an effect, like here Composition for having a title appear in the video, I put a keyframe at the end of the section, then with the number-select below I search for the frame one second ago and want to add another keyframe with the button. Instead it will remove the keyframe at the end of the effect. 

This behaviour is also present when searching in the video with the number-select input in the project-monitor. 

Reproducible: Always

Steps to Reproduce:
1. Add a transition (like Composition for titles)
2. Create a keyframe at the end of the effect (probably will work everywhere)
3. Put in a different position in the number-select
4. Click on Create keyframe

Actual Results:  
Removes the set keyframe

Expected Results:  
Create another keyframe

The state of the button probably does not get updated when searching around in the number-select; but the icon changes. 

Work-Around: searching with the time-line in the effect-monitor.