AC + DC Charging issue + OTA update related?

[pls1]

There was an OTA update a month or two ago in the UK, can't recall the number but pretty sure it had some charging 'issues' fixed in it.
Since applying it my 7kW AC charger at home stopped working on both ports - I don't know if this was directly related to the OTA update but happened around the same time.

Investigating the issue since, I've managed to charge the car OK on a friends AC 7kW charger and another 22kW AC public charger. Speaking to the charger manufacturer of my home charger, they checked the logs remotely and think it maybe an issue with the cable (tethered) so are planning to send another one.

DC charging however has also been problematic, up until about a week ago I've managed to charge on Tesla Superchargers but more recently it will start charging but then error after a few minutes. Last night I got the yellow 'Electrical System Fault' on the dash which went away after driving. Tried another BP Pulse 300kW charger which got a few more miles in the tank but then failed again.

I've got the vLinker MC+ scanner so wondering is there anything I can check in the app first before dumping the car at the OPC (again) for yet another fix. It was only in last week to replace the cooling fans.
Car has had all the recalls to date, don't know if any of the HV components have been replaced previously until I speak to the OPC on Monday.

Taycan 4S - 2020, Performance Battery Plus.

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[lasik]

Yellow Circle of Death Electrical Issue here as well. I tried to charge, and was out of town when i came back it had discharged to zero! Would not charge, had to have it towed to dealer. No news days later... Hopefully an easy fix? I disconnected and reconnected small battery before succumbing to service (2020TaycanTurboS-out of warranty?) . No surprise, disconnect/reconnect did nothing.