Symantec does not detect EICAR on big partition

Hello,

we have a Windows fileserver with SEP 14RU1MP2 installed on it. The fileserver has 6 partitions with different sizes. On 5 partitions SEP works great. But on the biggest partition it does not detect EICAR files which is really strange. The partition is 11 TB large.

I already repaired SEP together with the Symantec support and after that SEP works again good for a few days. The exeptions are also ok. But now we have that issue again.

Does anyone have an idea how to solve that issue?

Thank you!