LEDC PWM issue with 3.2.1 update

[cor-of-org]

Board

ESP32 (dev module)

Device Description

2USB CYD aka. ESP32-2432S028R

Hardware Configuration

A single temperature sensor, but removing it makes no difference.

Version

v3.2.1

IDE Name

Arduino 2

Operating System

Window 11

Flash frequency

40

PSRAM enabled

no

Upload speed

921600

Description

Using a CYD (2USB), setup RGB LEDbacklight:
ledcAttach(backlightPin, 12000, 8); // 12 kHz PWM, 8-bit resolution ledcAttach(redPin, 12000, 8); ledcAttach(greenPin, 12000, 8); ledcAttach(bluePin, 12000, 8);
Firing the LED like so:
ledcWrite(redPin, redValue); ledcWrite(greenPin, greenValue); ledcWrite(bluePin, blueValue);
When I add the buzzer output:
pinMode(DAC_PIN, OUTPUT); ledcAttach(DAC_PIN, 12000, 8);
And set a tone:
ledcWriteTone(DAC_PIN, freq);

Instead of beeping and flashing together, my RGB LED now turns white and refuses to respond, staying white thereafter, and no amount of disabling the DAC or resetting anything will make it respond.

This used to work fine with 3.2.0.

Sketch

Code included in description.

Debug Message

No error messages or crashing, aside from the RGB LED crashing.

Other Steps to Reproduce

No response

I have checked existing issues, online documentation and the Troubleshooting Guide

• I confirm I have checked existing issues, online documentation and Troubleshooting guide.

[cor-of-org]

I have found a workaround, which seems to point to some sort of timing conflict under the hood. If I setup the DAC with a different frequency from the LED, (e.g. ledcAttach(DAC_PIN, 8000, 8);) it works fine.