samba - Jan 2018 - Invalid...Unexpected blob length is too large

Hi,

I'm on Samba 4.7.4 AC DC built from source on Centos 7.3, DNS internal

In my log I see very often lines like this:

[2018/01/20 09:48:55.615903, 1] ../librpc/ndr/ndr.c:638(ndr_push_error) 
   ndr_push_error(6): Invalid...Unexpected blob length is too large

I googled and I found some similar messages for less recent version of 
Samba and they say this problem was fixed.

Any ideas?

Thanks

Giuseppe