You are creating a transport request assigned to a cts project which is assigned to a tasklist. You are facing the issue that the titel/description of the transport request is getting overwritten by the id and titel/description of the tasklist.

This issue is not occuring if no cts project is maintained/used.
This issue is not occuring if the used cts project is not assigned to a tasklist.
This issue is not occuring on TR creation. It is occuring only if a cts project is getting assigned after creation.

Please deactivate BADI implementation /TMWFLOW/ASSIGN_TRANS_DESC_UPD. This BADI implementation is usually not active, but it seems that it got activated in your system. If you want to use this BADI but if you don’t like the effect on transport requests created/controlled by CC5, you have to discuss the issue with SAP SE (and with us).