The tRunJob component is supported with limitations, which means that only S4 (Minor) support cases are accepted and no patches are provided. If you use tRunJob within Data Services and Routes (with cTalendJob), support is provided on a "best effort" basis only. In most cases, there are class loading issues which can sometimes be resolved but not always.
This is because tRunJob is not designed to work in a Service/Route style (ESB) deployment, so regular support is not provided if you decide to use it, even though it may work in many cases. If you used tRunJob in the past, it is recommended to change your Job Design to use Joblets instead.
For DI and non-ESB use cases, it is still a valuable component and will have full support as before.
Additionally, the Use dynamic job option is not supported within ESB Routes or Data Services at all.