HW SPI on ESP32 not working

[Harvie]

Hello, have you tried this in SPI mode on ESP32? I have esp32 devkit v1

I checked all pins using logic analyzer and there is no SPI data and clock anywhere. I used HW SPI like this (=default config in example). Even tried doing mos config-set i2c.enable=false spi.enable=true.

d2 = new Adafruit_SSD1306(21 /* DC */, 17 /* RST */, 5 /* CS */,
                            Adafruit_SSD1306::RES_128_64);

On the other hand, when i use soft SPI, i suddenly start seeing clock and data using logic analyzer:

  d2 = new Adafruit_SSD1306(33 /* SID */, 32 /* SCLK */, 21 /* DC */, 17 /* RST */, 5 /* CS */,
                            Adafruit_SSD1306::RES_128_64);

Any ideas what causes this?