is there congestion in the cell ?
Perhaps TRX from 1 to 6 are taking all the traffic already, and Nokia TRX allocation algorithm prefers to “reserve” those TRX only if there is more traffic.
did you block access to these TRX (preference mark ?) perhaps only PS traffic can be allocated there ?
if you lock other TRX 1…6, can the TRX 7 and 8 carry traffic?
this is a strange case, sorry i can’t help more…
when you say 4/4/4 configuration… what do you mean by TRX 7 and TRX 8 ?? Which cell do they belong to?