We know a few people are having this issue (not me btw)..
maybe you don't have enough connections or something, or your internet is dropping out.. or something else.. but just be patient ..

maybe opening firewall for the ports (in OP) will prevent/reduce it happening..

check dot-bit forum in the huntercoin section.. if not working, then be patient, can't do anything, just wait..

or read through the ways to fix in this thread instead of keep posting

spamming the same messages over and over does not make us fix faster, in fact, makes it slower <3