@Knobsi Hi, your question is already two years old. I guess you'll have found the answer, however I just came across it today. I want to share with you an experience I had yesterday:
Suddenly I encountered a problem after upgrading the Arduino IDE from v2.3.4 to v2.3.5.
The board that I use is an M5 Atom Echo which has an ESP32-PICO processor.
After compiling and building a sketch, that compiled, built, and ran OK with v2.3.4,
It crashed after compiling and building and running with v2.3.5.
In the crash report I saw "DIO".
In Arduino v2.3.5 I checked the setting: > Tools > Flash Mode.
I saw that the Flash Mode was set for: "QIO".
After I changed the setting Flash Mode it to DIO, re-compiling and building, the sketch ran OK.
Regards,
@Paulskpt