oleg FW r1445 blocking administration after few days

Hi I am using latest oleg firmware WL500W-1.9.2.7-d-r1445.trx
same isue was with older build (1222 i think)
with original asus firmware was ok

my problem
when I start router - it is possible to get access via WAN into administration.
but after few days - internet goes ok, LAN is OK but it is not possible to access administration via WAN, LAN

it is looklike that acces to administration is blocked ... possibility: restarting router then all goes ok

I think this is something you need to post to the general new oleg fw thread: http://wl500g.info/showthread.php?p=196778