I noticed that PLA seems to suffer from creep, the slow deformation of a material under load over time. Or at least I think it does.
For example the landing gear legs of a multicopter I've printed several months ago have noticeably yielded over time just by sitting inside a cabinet for that time.
Temperatures in my apartment can go up to 35 degrees centigrade, so that may be a factor, but the glass transition temperature of PLA is supposed to be 60C.

I wonder if that may be the specific composition/manufacturing of the PLA I used or if it is just the way that material behaves.

Has anyone noticed this effect on PLA (or other material) prints?