XF 1.5 all members have same threads in "last seen"

[marioman]

hi,

i have 2 threads in the forum shown in all members last seen
even who isn't open this threads
i opened many threads and still have one of this threads in my Last Seen
i disabled Listeners from config, upgraded forum to 1.5.18 and still have same issue
how to solve it

 

[marioman]

any help here ?