Hello! I have a similar problem. On my project I'm writing very large data directly to an sd-card without filesystem. So I'm using sdmmc_write_sectors_dma(). Everything is ok until I make a wifi connection to my esp32-wroom32. Please check out, that I write 100MB to the sd-card in chunks of 8kb. But...

I found the same adc1 side effect on gpi39 and gpi36. I think there is a relationship between adc1 operation and the hall effect sensor. In my program I do adc1_ch0 read (20ms), and every time I will get gpio interrupt on gpi39 and gpi36. My solution: move gpio interrupts away from gpi39 and gpi36. ...