[MSG:INFO: Compiled with ESP32 SDK:v3.3.5-1-g85c43024c]
[MSG:INFO: Configuration file:config.yaml]
[MSG:INFO: Machine ESP32 Jens production]
[MSG:INFO: Board ESP32 Jens production]
[MSG:INFO: SPI SCK:gpio.18 MOSI:gpio.23 MISO:gpio.19]
[MSG:INFO: SD Card cs_pin:gpio.5 dectect:NO_PIN]
[MSG:INFO: Stepping:RMT Pulse:10us Dsbl Delay:0us Dir Delay:0us Idle Delay:250ms]
[MSG:INFO: Axis count 3]
[MSG:INFO: Shared stepper disable gpio.13:low]
[MSG:INFO: Axis X (-850.000,150.000)]
[MSG:INFO:   Motor0]
[MSG:INFO:     Standard Stepper Step:gpio.12 Dir:gpio.14 Disable:NO_PIN]
[MSG:INFO:     Pos Limit gpio.17:pu]
[MSG:INFO: Axis Y (150.000,575.000)]
[MSG:INFO:   Motor0]
[MSG:INFO:     Standard Stepper Step:gpio.26 Dir:gpio.15:low Disable:NO_PIN]
[MSG:INFO:     Pos Limit gpio.4:pu]
[MSG:INFO: Axis Z (30.000,150.000)]
[MSG:INFO:   Motor0]
[MSG:INFO:     Standard Stepper Step:gpio.27 Dir:gpio.33 Disable:NO_PIN]
[MSG:INFO:     Pos Limit gpio.16:pu]
[MSG:INFO: Reset gpio.34:low]
[MSG:INFO: FeedHold gpio.36:low]
[MSG:INFO: CycleStart gpio.39:low]
[MSG:INFO: Kinematic system: Cartesian]
[MSG:INFO: Relay Spindle Ena:NO_PIN Out:gpio.32 Dir:NO_PIN]
[MSG:INFO: Using spindle Relay]
[MSG:INFO: Flood coolant gpio.2]
[MSG:INFO: Probe Pin: gpio.35]
[MSG:INFO: Connecting to STA SSID:Home]
[MSG:INFO: Connecting.]
[MSG:INFO: Connecting..]
[MSG:INFO: Connected - IP is 192.168.2.30]
[MSG:INFO: WiFi on]
[MSG:INFO: Start mDNS with hostname:http://fluidnc.local/]
[MSG:INFO: SSDP Started]
[MSG:INFO: HTTP started on port 80]
[MSG:INFO: Telnet started on port 23]

Grbl 3.2 [FluidNC v3.2.7 (wifi) '$' for help]```

Is the problem repeatable?
yes

Under what conditions does the bug occur?
Manual click in the web interface on "Spindle" button shows no effect, same with M3.
"S<any number> M3" (on) and "S0 M3" (off) works in NC file and in command line.

Preferred behaviour is that relay spindles should be switched on/off by button, too.