The decoded version of the TAF will not display TAF information that is for a period of time that has past. Therefore, if a TEMPO portion of a TAF is in the past, then the TEMPO portion will not be decoded and displayed.
In image 1 below, the temporary condition was valid on the 30th from 1900 to 2100Z. The picture was taken on the 30th at 19:25 Eastern, which would have been 2325Z, which is after the Temporary period. Therefore, the TEMPO portion of the TAF was not decoded and displayed.
Image 1. A TAF with a TEMPO entry that is not decoded due to being in the past.