Standard Dynamic Field ist not updated, but Date Dynamic Field gets updated

Hi Experts,

can you please help me with the following: Our middleware sends an update to a specific employee. The Dynamic Date field gets updated, but the dynamic Standard field is not updated.
We cannot reproduce this with Insomnia/Postman -> both field are updated.

Do you have a idea/solution?

Extract Logging:
PATCH
{"employee":{"custom_attributes":{"dynamic_11542316":"21965823","dynamic_9818860":"2024-04-18"}}}
The first field is not updated.

Answer from Personi: {"success":true,"data":{"id":21965823},"meta":[]}

Thanks!
Simon