PDOException: there is no active transaction

EDIT: i forgot to add i just upgraded to version 2.0.2. Maybe this has something to do with it?
I have two database connections on my project. I tried to use an isolated transaction in a function but it threw the error mentioned in the title ("there is no active transaction").
By the way, i did not have this problem before, but it might be due to the fact the last time i used this method there was no second connection.
I did this example intentionally simple and naive, the code is actually quite a bit longer and obviously does not involve cats.

<?php

try{
    $transaction = $this->getDI()->getTransactions()->get();
    $person = new \Person();
    $person->setTransaction($transaction);
    //do other code stuff
    //....
    if(!$person->save()){
        $transaction->rollback('Human could not be saved');
        //it will not think there is any active transaction at this point
        //and will instead throw an error
        }
    $cat = new \Cat();
    $cat->setTransaction($transaction);
    $cat->setWhiskerLength(1000);
    if(!$cat->save()){
        $transaction->rollback('The kitty could not be saved');
        //it will not think there is any active transaction at this point
        //and will instead throw an error
    }
    $transaction->commit();
catch(Failed $e){
    echo $e->getMessage();
}

Both database connections are set $di->setShared(connection name)

I have no clue how to solve this problem. It used to work well.
Any ideas? Thanks in advance