no it’s normal, at this level of humidity, i have 2 ams 2, and it’s the same.
when i said long print it’s 3/4 days 
Then your filament wasnt really dry in the first place. Maybe the outter layers were. Dry longer. Dry until its stable an hour after it cools from drying. The ams is sealed and with desiccant, holds a super low humidity level
my problem was to store filament outside the dryer, it was only 4 places, now i have bought a lot of watertight ikea box to store them
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