My Rank in PT Suddenly Drop From Gold 1 to Bronze 4

[ManyunAGS]

Dear Wargaming

In PT 0.10.7 Round 1, I Got Rank 1 Gold. In PT 0.10.7 Round 2, my rank drop to Rank 4 Gold, and it makes sense. After played for few hours, i made to Rank 1 Gold. I cannot played rank anymore right ? So I play Random. When finish in Random, i check my rank and my rank suddenly drop to Rank 4 Bronze. Is that a bug ? or i played against rules ?

Sincerely

ManyunAGS

[ManyunAGS]

This is the list of replay of my game when i played rank in PT 0.10.7 Round 2 today, start from Rank 4 Gold Using Montana in 06.11 PM UTC+7 to Rank 1 Gold Using Balao in 09.21 PM UTC + 7. But when i open one of the replay, suddenly it shows error like this.

Is this a bug ?