Monoprice is just a reseller of cables. They don't actually mfr the cables so quality will vary from cable to cable unless you purchase from a known mfr like BJC, MediaBridge, etc. 25' is usually the maximum length for a Premium High Speed HDMI cable (certified with the QR label for authenticity) but there are a few that push it to 30'. The cable thickness is due to the fact that the passive cable wire gauge needs to be a bit thicker the longer the cable is to pass the certification process. As you have seen, the downside of a certified passive cable is loss of bend radius (flexibility) which can put undue strain on the HDMI ports. That being said, if you were careful, and I'm sure you were, when moving the soundbar, then the cable should not have popped out of the port. Certified cables should fit nice and snug in the port unless there is an issue with the port itself. As a side note, if you connect/disconnect an HDMI cable make sure the connected devices are powered off because it's possible to damage an HDMI port.