Description of problem: It looks like that Satellite struggles to process ansible facts during ansible role execution when target hosts have unusually high amount of ansible facts. Example of such host could be a RHV host that holds a lot of NICs. How reproducible: I'd expect this to be reproducible if one has an access to a suitable environment. More information will follow in my next private comment. Kind regards, Jan
What can quickly help is to setup the facts blacklist in Settings. Navigate to Settings -> Provisioning -> Exclude pattern for facts stored in satellite, add more fact names. As you can see in the default value, * wildcard can be used. Looking at the logs, it seems there were around 7k facts. That may not be only caused by multiple NICs. Make sure you don't have ohai installed on the machine. Ansible by default uses multiple fact providers and ohai (facter from chef) is extremely verbose. This can be disabled in ansible.cfg.
Closing as CURRENTRELEASE following comment #6, seems fixes included in 6.10 resolved this issue.