I’m assigning 1000 leads to another user. First the process gets stuck because SuiteCRM tries to send a separate email for each assigned lead to the user (why??). After disabling that in the Email options i still get a 500 error after a couple of minutes and when checking the suiteCRM log i see this:
Thu Jul 19 09:16:40 2018 [FATAL] log call at: modules/Administration/index.tpl:54 - MY_FRAME is not set
When loading the Leads page again i see 990 out of 1000 leads were assigned to the user.