Trace dependents not finding relationships which are there

[wikurbia]

I am using Excel 2016. I have the following formula in cell A3 =A1+A2. If I select A3 and click Trace Precendents then it highlights A1 and A2. If I select either A1 or A2 and click Trace Dependents I get a message saying "The Trace Dependents command found no formulas that refer to the active cell" which is clearly untrue. Neither the sheet nor the woorkbook are protected. I can't find any threads which have this problem with such a simple formula. Any suggestions?

 

[Gerald Higgins]

I can't replicate this.

When I select A1, it draws an arrow between A1 and A3, as expected. Same with A2 / A3.

Are you sure you actually selected cell A1 or A2 ?

 

[wikurbia]

https://lancaster.box.com/s/1p5rfv61hdikyrylx0rlj5pcuyd5awa5

I think so, not sure if the link to screen shot will work. It shows the trace precedents arrows and the message with cell A1 selected.

 

[Gerald Higgins]

Sorry, I'm not following that link.