artefacts when recording starts/stops on second tuner

[2stein]

quite a few people seem to have problems with artefacts when a recording starts/stops using the second tuner.
the problem seems to show up only with quad-lnbs (maybe just a few brands).
some people were sucessful in circumventing the problem by inserting an external multi-switch.
is there any other (cheaper/easier) circumvention for this problem?
thanks.
p.s. the problem also exists on at least duo and ultimo as well.