Hello Lssar
First thanks for trying to explain !
My flight was a sunday afternoon in december (the 18th).
I was surprised when i tried to discuss with the ATC on the frequency, he told me that the FPL validity is 25min, i tried to told him that normal FPL is valid 30minutes and he disagreed (!!!).
I tried to find in the Jeppesen doc if there were special procedures in spain for FPL but i didn't find anything.
In the Eurocontrol doc, it is also said that the FPL is suspended after 30 minutes...
Still very strange...