Rescale the new root part with 'scale children' enabled
What happened?
Re-rooting to a radially attached tank will make it scale around the wrong point and also not scale its children.
Additionally scaling does no longer affect the fuel amount.
confirmed, looks like the srfattachnode on the new child part doesn't get pointed back to the parent. Interestingly, this problem persists if you save the craft and reload it.
What did you do before the bug occurred?
What happened?
Re-rooting to a radially attached tank will make it scale around the wrong point and also not scale its children. Additionally scaling does no longer affect the fuel amount.
Upload your ksp.log file
KSP.log