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What does I/O/T stand for in a pinout diagram? (esp32-s2)

I am looking at the pinout of an esp32-s2 board with LCD Display (see picture below) and I am wondering what I/O/T stands for. I am particularly looking at pin IO46 and wondering if it can be used ...
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Is it possible for the Arduino's digital pin mode to flip from OUTPUT to INPUT unexpectedly?

I have an Arduino project (data logger intended to sample 100 samples per second for months) with firmware that is too long to post. It mostly works as supposed to, but I have a confusing issue I can'...