Objects on my timeline are getting longer when I 'show/hide' them

Has anyone else noticed their objects getting about .50 seconds added to their start time when clicking on the 'show/hide' icon?  This is the second time I've noticed this happening on something I'm working on.  I will click on the 'eye' icon and it will add about a half of a second worth of time to the start time of object.  It will keep adding every time I either show or hide the object.  It seems to happen intermittently.  It won't always happen on the same object, and sometimes if I click on something else and go back to that object it won't happen, but then it starts happening on another object.  Very weird.  Thoughts?

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