I am having this problem : - Everytime when there is a thunderstorm my unifi modem will get PON blinking then LOS red led blinking, i lost internet for whole night but on morning it's back online - PON green solid led.

I report the problem on 100 hotline twice, but technical case just get resolved overtime and never came to check the cables at all - I even asked for it.

Anyone had this issue before? I suspect my fibre cable / port on the tiang gets wet and breaking the connection.

ok tm fixed it for me, the fibre cable behind has bite signs so had to replace the whole cable to fibre pillar - no charge.

I raise 3 case and whole week

FYI

for all those who plan to switch unifi to other ISP : For unifi, the services will be auto terminated by system on day 11 from the Transfer Request (TR) Approved Date - approval takes usually 5-6 working days after you visit TM point for switching ISP.

if your new ISP (Eg. Maxis) delays the installation time, you will suffer internet outage after Unifi automatically terminates it - once terminated there is no way to revert this and there will be no extra port to restore back the Unifi - your existing port will be transfer to new ISP.

This is a new process and there is no warning / briefing by TM frontline staff when you submit this transfer request...