You say your tire was inflated to 50 psi, which I'd think adequate for a 2.0 inch tire. However if you didn't check your tire pressure before your ride, then it may have been much lower.
The thin rubber tubes we use whether latex or butyl will loose air over time. Though with lower PSI and higher volume tires as yours are they do seem to go further between top offs than my 25mm wide tires which I top off at least every third day of consecutive days of riding..
One of the big tell tail signs of something being wrong is if your valve stems are not perpendicular to the rim. If they are leaning, then that is future problems and you need to find out why. Usually for me that had been underinflation.
Last edited by Iride01; 09-17-22 at 10:17 AM.