Lost continuity to UEXT on just GPI36?

[KeviNH]

We are using Serial1 and I2C via the UEXT connector on ESP32-POE-16MB.   

Yesterday on one device, Serial1 stopped responding.   Checked our connections and we have continuity through to our UEXT jumper.

Checked the ESP32-POE-16MB board itself, and there is no continuity for GPI36 between EXT (board edge pin header) and the corresponding UEXT pin!   All other GPIO's found on both show continuity, just not this one pin.

Has anybody else experienced a similar issue?   We had an unexplained failure a while back on an ESP32-POE which might also have a similar fault, we had a spare for that one and so just swapped it out without a lot of diagnosis.