Can’t flash Aoycocr U3s with psk Id 01

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I’m trying to flash a pack of 4 ayocor us3 smart plugs but failing at waiting for intermediate firmware. The devices connect to the ap and I can ping them but after hours of attempts I can’t get past the firmware error.

After a lot of attempts I managed to flash one to tasmota bit after a reboot it’s now dead. Does not connect to Wifi and does not respond to putting it back in flash mode.

The other 3 won’t flash. I’ve checked the logs and the psk Id starts with 01 and not 02 so it doesn’t seem to be the new firmware issue many reported.

Any ideas where to start with troubleshooting?

Start by collecting the complete flashing logs, device names and models, firmware versions, and the point where each attempt stops while waiting for intermediate firmware. Compare the PSK ID and connection behavior across the four plugs, including the device that became unresponsive; done means identifying a reproducible failure cause or a confirmed recovery path.

Written by the indexing model from the issue text.