Fascinating if this is the cause. I'm going to remove the BB and investigate. No way would I have 'aired out the seat tube'.
Or the weep hole got blocked by the bag of potting mix that's inside that frame of yours
True, but even if there was there's no drain hole in the BB shell.
@pascalo started
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Fascinating if this is the cause. I'm going to remove the BB and investigate. No way would I have 'aired out the seat tube'.