To my knowledge there is no "conservative setting" on my zoop.
There is, they call it "personal adjustment mode". You get to choose P0, P1 or P2. Some other Suuntos have P-1 and P-2 which are slightly more aggressive.
You may have suffered from ignoring a previous "mandatory safety stop". It will give you one if you exceed the proper ascent rate. If you do it then your subsequent NDL times are not affected but if you do not then they will be shortened.