Root Cause: Context menu option "Ignore queue limit" is not always available in AWI if multiple objects in "Process Monitoring" are selected.
Update to a fix version listed below or a newer version if available where task statuses have been updated to allow both single and multi-select action for Registered, Waiting for start time, Waiting for Preconditions, Waiting for Queue slot, and Waiting for user input.
Fix Status: Released
Automation Engine 12.1.0 - Available
Automation Engine 12.0.1 - Available
Right-click the objects one by one and select Ignore Queue limit.