Cannot decrease tempo

Audacity version: 2.2.2
Windows 7

When changing the tempo of a selected track, I can only increase the percentage. Attempting to decrease the tempo into the negatives - or anything less than around 10, even - I get the following message (both for clicking ‘preview’ and for ‘ok’):

“Value not in range: 10.55 to 32705.31”

Strangely, attempting to ‘preview’ at a lower number still works as long as that number was the default when opening the change tempo window, but changing the slider/percentage number at all yields the aforementioned error.

Is this with the “Change Tempo” effect (

How long is the track, and what are the exact settings that you are using?
Are you using the slider to set the percentage change, or typing the value somewhere?