Rogue leak bursts noted on D/Ls may (probably) have nothing to do (directly) with mask fit, but rather having an immovable tube because you (or someone else) is lying on it and it will not follow your face as you roll over.
Before you drop 20-30 bucks on a $7.00 plant hanger (because they're calling it a CPAP Tube Suspension System instead of a Plant Hanger), do a little reading:
Plant Pulleys
RGLs