I have this problem for quite a few months.
I can't access certain websites/Applications at a certain time.
the websites are random, but surely not something popular like WhatsApp or YouTube.
List of websites/Applications that I cannot access in specific day/hours in a month (can be any day, any hours, quite random)
1. Telegram
2. Zoom
3. Lazada
4. Shopee
5. Microsoft Sharepoint
and many more... (I should list them down next time)

I can't access in certain time, but I can access them the next day.
Most of the day I can access them, but there is 1 or 2 days in a month, I can's access certain of them.

I called hotlink a few times,
they asked me to check this, check that, reset this refresh that...
after ding ding dong dong,
then they said it is my phone problem.

but at anytime,
once my phone connected to the wifi,
I can use just any websites/applications.
but just not working with HUP.

I am using Hotlink Unlimited Plan 3mbps.
Anyone is facing this issue?