The transmitter issue was not a sensor issue - it was a safety issue regarding the physical handling of high pressure. My understanding is that it was possible for the plastic cap/body to fail (explode?) when pressuring the tank. I don't know if anything inside was changed by the service centers or if the plastic cap was upgraded, but the most significant added element was adding a small pressure flow restrictor to the unit inlet so the interior pressure builds more slowly upon initial pressurization.
The SUUNTO depth pressure recall is only for the USA and has nothing to do with the transmitter issue. SUUNTO denied that they had an issue for years despite the fact that they were battling this in court.