[DEBUG] iMSCP::LockFile::release: Releasing exclusive lock on /var/lock/imscp.lock
[FATAL] iMSCP::DbTasksProcessor::processDbTasks: cp: cannot stat ‘/var/www/imscp/gui/data/persistent/softwares/2/drupal-8.7.5-1.tar.gz’: No such file or directory at /var/www/imscp/engine/PerlLib/iMSCP/DbTasksProcessor.pm line 400.
Before talking about any redirection issue, please fix that one... If a fatal error is raised at some point, some of queued job could be still awaiting... And please, provide us the exact steps to reproduce the problem, including the real domain/subdomain names you used.
Thank you.
BTW: You shouldn'tt use the software installer because it is not really maintained.