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MPPT -> BP100 E1 Error & Absorption

I'm experiencing an issue whereby the BP100 from my MPPT 50/100 is erroring with E1 in the following situation:

1. Temperature drops below BMV-712 Relay trigger amount during the night (5c)
2. BP100 is remotely disconnected via BMV-712 relay
3. Sunrises
4. MPPT in Bulk shows a PV voltage but no current (obviously, BP100 is still disconnected)
5. At some point MPPT moves to Absorption
6. Temperature rises to reset BMV-712 Relay trigger (6c)
7. BP-100 errors with E1, with MPPT still in Absorption

At this point I disconnect the PV fuse to reset the MPPT and BP100, when I reconnect fuse MPPT goes back into Bulk and BP100 works as expected.

Notes:
- I have the MPPT connected to the BP100 Input and battery to the Output so as it's not reversed
- The distance between my battery and BP100 / MPPT is all of 30cm
- The distance between BP100 and BMV-712 is about 50cm
- I'm 90% confident there isn't a short-circuit, I previously wired the remote disconnect to the wrong BP and the whole system was working as expected (apart from the low temperature MPPT disconnect)

See circuit diagram attached.

mppt smart solarBattery Protectmppt charging
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