The degasser should maintain pressure. Please review the online help for your pump in the Console Diagnostics and if you are concerned, run the Degasser Health Check, if you suspect that chamber leaks or there is fluid in the chambers. There could be condensation which mimics a leak and can be exacerbated if there is a temperature gradient in the area where the pump is situated, as defasser is located at the front.
causes the system to not reach pressure on startup, pressure to raise during
operation or flooding the system with fluid. The solution is to replace the degasser chambers
Hope this helps