Multiple disconnects during Frontline

Time: everytime inside Frontline instance, last time yesterday Tuesday, 22:25 gmt+1, since patch 2.38
Frequency: always, at least once per match, up to 8 times in the same match
World name: Excalibur
Character name: Chibi Bebe
NPC name: N/A
Monster name: N/A
Class/Level: at the time of duty either WHM50 or SMN50
Party or solo: light/full party, 24/48/72 alliance
In-game time: Could not check in time, only have real time
Area and coordinates: The Cartenau Flats, Mor Dhona

Frecuent disconnect errors 90000 and 90002 whenever in Frontline, one disconnect minimum per match.

Connection Specs
- Type of internet connection/provider: ADSL/Sky
- Modem maker/model number: Sky/Sky Hub

Model Number of the PlayStation®3 You Are Using
- Model Number: CECH-4003C

Information About the Peripherals You Are Using
-Type: controller, Dual Shock3
-Maker: Sony
-Model Number: CECHZC1E