A non well formed numeric value encountered in /vendor/opensrs/osrs-toolkit-php/opensrs/Ops.php on line 177

[pentatonicfunk]

Above PHP notice always logged on most if not all opensrs requests

[29-Jul-2022 01:12:43 UTC] PHP Notice: A non well formed numeric value encountered in /vendor/opensrs/osrs-toolkit-php/opensrs/Ops.php on line 177

[pentatonicfunk]

seems related to this block

 ++$this->_MSGCNT;
   $msg_id = $this->_SESSID + $this->_MSGCNT;

where $this->_SESSID = \uniqid();, which is string, so it seems wrong concat operator ? or is it meant to be numeric ?