I facing same problem. But call maxis difficult to get pick up call & answer.
I m from maxis 30MB upgrate to maxis 100MB.
TM have come change new modem.
Maxis have come change router from (tg784n v3) old router to (tp-link 1200AC) new router.
Starting  1 week everything is find and good.
But now will random disconnect when night (7pm-12am)
1day will disconnect around 100++time.
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If i switch back previous router (tgn784n v3) it will work for maxis 100MB plan or not?

Recently i try to off router around 1 hour and on back.
Everything is fine and good back. Is it “tp-link archer c5v” low quality?

Where can I buy a router which already set for maxis usage? I am fed up with the c5v.