seems I cannot pool mine without this happening after only a few minutes:
ContextualCheckBlockHeader::FAILED incorrect proof of work at 132806, block.nbits 469802878.000000, next work 459223285.000000ERROR: TestBlockValidityLite: Consensus::ContextualCheckBlockHeader: bad-diffbits, incorrect proof of work at 132806, block.nbits 469802878.000000, next work 459223285.000000 (code 16)