Padron 80th is a figurado, so my first question is how much of the "head" you cut off.
Cut off too little, you are not drawing enough air thru the cigar to sustain burning.
Cut off too much, the cigar falls apart.
If you do not know and are not too experienced in cutting a figurado, try using this:
Second, did you lit the correct end of the cigar?
The open flat or round end is the foot, you lit that end.
The pointy end is the head, which you have to cut, to draw thru.
I seen an inexperienced smoker wasted an 80th by lighting it the wrong end, have the same issue as you.
Third, you sure that your cigar is real, there are fake Padron and Fuente cigars out there, and because Padron anny command higher prices, they are one of the few non-cubans that are faked.
Does yours have the triple bands, like in the picture, and come in either a box of 8 or 10?
Finally, assuming your hydrometers are correct, and you are using 69% pack, what is the temperature?
In my experience, hydrometers can be off by 1 or 2 percent, and I keep mine at 65%, that includes the aging humidor, and I live in South Kalifornia, which tends to be dry (and in an 24 Hour AC house, which is even dryer).
70%/70F is an ideal and reference number.