1- The USB-C versions seem to have something going on with the boot loader pins.
A 0.1uF capacitor between the ground and enable pins makes it behave as it should, without it, you need to hold the little button down when you flash it to enter bootloader mode.
2- The MicroUSB versions actually have a bootloader lag and do not reset as they should. They still work fine but they would flash faster and the web installer reset do not work as they should. Settings changes should always have a power cycle so no day to day issues either.
A 10k resistor pull-up from 3.3 to gpio-0 makes these function as they should
(sorry for the overlap still learning scope adjustments) No pullup, look at that funky dip before the actual signal.
With the pullup, you can see it full sequence as it should be.