Act on behalf of customer not working

[helperbee]

Version is 1.2.2.  "Act on Behalf" worked in 1.2.1 and may have worked initially in version 1.2.2 but I can't verify that the shop owner used it right after upgrade. Is it advisable to upgrade while this problem exists?

We're also having a critical app error message stating "aMySQLi  class error: Try to escape non-string value:array(0=>'748',) in /home/xxx/public_html/shop/core/database/amysqli.php in line 118"

Could it be related and should we resolve this mySQL error prior to upgrade?