ESP32 GPIO pins when including IrReceiverSampler.h

[raisinbread]

One problem I've run into. I've been using the IR library with great success, but I ran into a snag, and it's something I don't understand.

If I create a simple sketch where i do this in setup():

pinMode(21, OUTPUT);

And this in loop():

digitalWrite(21, HIGH);

...an LED that I've wired to that GPIO pin (labelled D21 on the ESP32-WROOM-DEV board itself) lights up just fine.

If instead, all I do is add this:

#include <IrReceiverSampler.h>

...after the include to Arduino.h, my pin won't go HIGH. I've tried multiple pins on my board, and none of them will go HIGH when I have IrReceiverSampler.h included, but immediately work if I comment this include out. Is there something in the library that might cause this?

[raisinbread]

Oddly enough, if I use the ESP32's gpio library, it works—even with the Infrared4Arduino includes in place. So this works (pin goes HIGH, LED lights up):

gpio_set_direction(PRIMARY_FIRE_PIN, GPIO_MODE_OUTPUT);
gpio_set_level(PRIMARY_FIRE_PIN, HIGH);

But this doesn't (pin stays LOW, LED stays off):

pinMode(GPIO_NUM_21, OUTPUT);
digitalWrite(GPIO_NUM_21, HIGH);

The only way to make the pinMode/digitalWrite version work is by removing the I4A includes.