TDR cable diagnostics only works on master switch in a stack

[howardtopher]

Trying to avoid opening a case unless I have to.  We have noticed that the TDR cable diagnostics works on the master switch in the stack, but not on any other stack members.  This is on 08.0.30r.
Any one know if this is a known problem and if there is a fix for it?

ID   Type          Role    Mac Address    Pri State   Comment
1  S ICX6450-48P   member  0024.38c3.e540 235 remote  Ready
2  S ICX6450-48P   member  0024.38c1.8080 225 remote  Ready
3  S ICX6450-48P   active  0024.38c2.6900 255 local   Ready
4  S ICX6450-48P   standby 0024.38bc.13c0 245 remote  Ready
5  S ICX6450-48P   member  748e.f80a.e380 215 remote  Ready

#phy cable-diagnostics tdr 1/1/1
#sho cable-diagnostics tdr 1/1/1

Port    Speed    Local pair    Pair Length    Remote pair    Pair status
----    -----    ----------    -----------    -----------    -----------
1/1/1   UNKWN    Pair A        0000003M                      Failed
                 Pair B        0000003M                      Failed
                 Pair C        0000003M                      Failed
                 Pair D        0000003M                      Failed

#phy cable-diagnostics tdr 3/1/1
#sho cable-diagnostics tdr 3/1/1

Port    Speed    Local pair    Pair Length    Remote pair    Pair status
----    -----    ----------    -----------    -----------    -----------
3/1/1   UNKWN    Pair A        0000054M                      Open
                 Pair B        0000058M                      Open
                 Pair C        0000056M                      Open
                 Pair D        <=3    M       Pair C         Impedance mismatch