HI
I wonder ? is this logical ?
lets assume that successful bit swapping has taken place (no loss of synch) because of noise and in that process bins X,Y,Z were marked as unusable .Then the bits that were in bins X,Y,Z are now distributed to other bins . So even though the bins may become usable again they will NOT be used until they are required . So until some noise in other channels force bits swapping to populate bins X,Y,Z (this may not happen if there is enough SNR in currently populated bins ) the bins will remain empty. If on the other hand you reboot or swap routers then A brand new bin allocation is created .Populating all available bins optimising SNR.
Regards Jeff