Why is LDAP Search So Slow for One Domain on My Linux Server?

I'm stepping into a role where I've inherited a cloud setup with Linux VMs configured for SSSD across six domains. I've run into a frustrating problem with one specific server: when trying to query users in the '.bad.com' domain, it can take four minutes to retrieve group information from the domain controller. This delay often causes SSH timeouts before even getting prompted for a password. Interestingly, for users in other domains, the 'id' command returns results almost instantly—like 0.004 seconds. I've checked the network routes since all VMs are on the same setup and initial pings and traceroutes show no issues. I've also enabled debugging on the SSSD config and looked into performance tuning parameters, but nothing seems to work. I've tried replicating the setup on a test VM without recreating the issue, so I'm at a loss. Any tips or creative ideas would be appreciated!