The guys at BT Harrogate are aware of tge issue of the Mk3 SSFP so it is definitely legit issue.
Me thinks that you intended to paw out "
issue of the Mk2 SSFP", as that is the device of which the Wizards of
Grimbledon Down1 were tasked to "look again". The Wizards looked, changes were made and the Mk3 SSFP is the result.
Of course the Mk3 could, in turn, be lacking!
1Adastral Park