In reports some result, don't show severity

GVM versions

Greenbone Security Assistant 21.04.0~git
Greenbone Vulnerability Manager 21.4.0
Manager DB revision 242
OpenVAS 21.4.0
gvm-libs 21.4.0

Linux KaliGVM-1 5.10.0-kali8-amd64 #1 SMP Debian 5.10.40-1kali1 (2021-05-31) x86_64 GNU/Linux

Hi all, i’ve a questione about the reports, it often happens that the index of the report don’t show the severity of the result, how in this example:

I see N/A, but if i explore this result, i can see the severity of all CVE

I don’t undestand why, if i look the NVT database is ok ( NVTs 70881 of 70881 NVTs by Family (Total: 70881))
does anyone have suggestions?