After upgrade to 2.246 ta same alsa issue, I2S off, reboot, I2S on, same issue 
Pi Zero W, Justboom Amp
Pi Zero W, Justboom Dac
volumio@volumioamp:/boot/overlays$ ls
README i2c-gpio.dtbo pwm.dtbo
adau1977-adc.dtbo i2c-mux-pca9548a.dtbo qca7000.dtbo
adau7002-simple.dtbo i2c-mux.dtbo raspidac3.dtbo
ads1015.dtbo i2c-pwm-pca9685a.dtbo rotary-encoder.dtbo
ads1115.dtbo i2c-rtc-gpio.dtbo rpi-backlight.dtbo
ads7846.dtbo i2c-rtc.dtbo rpi-cirrus-wm5102.dtbo
akkordion-iqdacplus.dtbo i2c-sensor.dtbo rpi-dac.dtbo
allo-boss-dac-pcm512x-audio.dtbo i2c0-bcm2708.dtbo rpi-display.dtbo
allo-digione.dtbo i2c1-bcm2708.dtbo rpi-ft5406.dtbo
allo-piano-dac-pcm512x-audio.dtbo i2s-gpio28-31.dtbo rpi-proto.dtbo
allo-piano-dac-plus-pcm512x-audio.dtbo i2s-mmap.dtbo rpi-sense.dtbo
at86rf233.dtbo iqaudio-dac.dtbo rpi-tv.dtbo
audioinjector-addons.dtbo iqaudio-dacplus.dtbo rra-digidac1-wm8741-audio.dtbo
audioinjector-wm8731-audio.dtbo iqaudio-digi-wm8804-audio.dtbo sc16is750-i2c.dtbo
audremap.dtbo justboom-dac.dtbo sc16is752-spi1.dtbo
bmp085_i2c-sensor.dtbo justboom-digi.dtbo sdhost.dtbo
boomberry-dac.dtbo lirc-rpi.dtbo sdio-1bit.dtbo
boomberry-digi.dtbo mcp23017.dtbo sdio.dtbo
dht11.dtbo mcp23s17.dtbo sdtweak.dtbo
dionaudio-loco-v2.dtbo mcp2515-can0.dtbo smi-dev.dtbo
dionaudio-loco.dtbo mcp2515-can1.dtbo smi-nand.dtbo
dpi18.dtbo mcp3008.dtbo smi.dtbo
dpi24.dtbo midi-uart0.dtbo spi-gpio35-39.dtbo
dwc-otg.dtbo midi-uart1.dtbo spi-rtc.dtbo
dwc2.dtbo mmc.dtbo spi0-cs.dtbo
enc28j60-spi2.dtbo mpu6050.dtbo spi0-hw-cs.dtbo
enc28j60.dtbo mz61581.dtbo spi1-1cs.dtbo
fe-pi-audio.dtbo pi3-act-led.dtbo spi1-2cs.dtbo
goodix.dtbo pi3-disable-bt.dtbo spi1-3cs.dtbo
googlevoicehat-soundcard.dtbo pi3-disable-wifi.dtbo spi2-1cs.dtbo
gpio-ir.dtbo pi3-miniuart-bt.dtbo spi2-2cs.dtbo
gpio-poweroff.dtbo piscreen.dtbo spi2-3cs.dtbo
hifiberry-amp.dtbo piscreen2r.dtbo tinylcd35.dtbo
hifiberry-dac.dtbo pisound.dtbo uart1.dtbo
hifiberry-dacplus.dtbo pitft22.dtbo vc4-fkms-v3d.dtbo
hifiberry-digi-pro.dtbo pitft28-capacitive.dtbo vc4-kms-v3d.dtbo
hifiberry-digi.dtbo pitft28-resistive.dtbo vga666.dtbo
hy28a.dtbo pitft35-resistive.dtbo w1-gpio-pullup.dtbo
hy28b.dtbo pps-gpio.dtbo w1-gpio.dtbo
i2c-bcm2708.dtbo pwm-2chan.dtbo wittypi.dtbo