support duplicated on iso

Dear all

in a specific context ,suport is duplicated on isometrics drawing and material list isometric.
Context that i find is :if compref is a tee and an ATTA is present between ancil and tee ,the bug is comming
Why this context ,because:
test 1 : i delete atta --> it's ok
test 2 : i keep atta but add a weld conn ti tee (compref become weld) --> it's ok
each case that user report me are similare but:
i can't replicate myself, could be an other conditions that  i don't know ,try on project and also aps project.

Do you have already see this bug?