IRU State/Filter windows show up blank

[-VETTE]

I'm not sure if this is user error or a bug, but I'm having trouble with the INS. The IRUs all align just fine and everything, with no indication of failure, but then none of the PL21 displays show any heading or attitude movement (the standby is just fine). I tried the "immediate reset" option, and it changed the attitude that was stuck, but it was still stuck showing one attitude. There are no triggered failures.

Also, all the IRU State/Filter windows show up blank; I'm not sure if that has anything to do with this, but figured it doesn't hurt to mention.

Log.txt