this is the line movement of the match which was played on May 19

https://ecapper.ru/lc/event.php?id=7896011&t=handicap

the drop/rise of the lines happens at around minute 8, newfish placed his orders at minute 14 to 19.

in my opinion the gap between minute 8 and 14 is pretty huge to consider newfish had any inside info.
Option 1: newfish just got unlucky and placed bets on a fixed match.
Option 2: newfish is hunting for fixed matches which is also not forbidden.

In my opinion, fairlay didnt close the doors so they should honor is winnings, it is the bookies fault if they still take action on lines even though there is suspicious line movement