Indeed this looks strange.

I am unable to reproduce the problem - I suspect “user error”.

Some things to try:

1) Check the time signature for that measure.

Could it perhaps have a “real” time signature of 5/4, but displaying a time signature of 4/4?

2) Does the playback sound correct? - correct rhythm, and correct number of beats?

3) It looks like the tuplet bracket includes the quarter rest.

Is the rest included in the tuplet? Or is the bracket just extended?

Make sure that that tuplet is really 5 8ths in the time of 4 8ths. But I've also seen weirder things after manipulating measures that have tuplets, like getting 25:12 etc. thanks to quantization settings.

I just tried it myself with my default document and it works fine. So I suspect something isn't right with a setting on your end as Peter mentioned. 

I definitely used 5 8ths in the time of 4 8ths and all the other settings were at default and it still gave me a rest at the end of the measure. It somewhat sounded correct but hard to tell since the tempo is 132. 

I did figure out a workaround by creating the quintuplet first in the measure then added the regular 8th notes. Then I manually moved the half measures around to get them in the correct order. Doing it this way didn't give me any rests at the end of the tuplet. 

Thanks for the help and pointers. 

Can you repeat the error? Do you have Finale Speedy or Simple entry both set to Check for Extra Notes?