No interrupt on Adafruit Huzzah32 + Huzzmat

[zubrick]

Hello,

I have a huzzah32 with the huzzmat, and running this code doesn't work.
It compiles, and doesn't crash, but it seems that the display_updater() function never gets called, leaving the screen blank.
The screen works, and if I call explicitly the display() method of pxMatrix frequently enough I get a stable image on the matrix.
It is like if there where no timer interrupt on this esp32 board.
Any idea where it could come from?

Best regards