Error with editing two different records on Portal

I run GP that includes iView that edits record in MDM store.

it work correctly.

But if I run two such processes on one machine error happens:

"You are editing a record in another window. Please save or cancel your changes before continuing, and then reselect this record".

records under editing is different,

so this message is not correct.

what is the reason of this? and

how to correct situation ?

thanks