[Silicone sock issues with S3]

How do I get this sock to stay on?  No matter what I try, the replacement just falls off.

[Problem with Extruder 1]

We have an issue where our printer, since pretty much day 1, will print OK for a while, then it will eject the bowden tube out of the extruder.  I can put it back in and give it a good pull and it feel secure and it will print several prints and do it again.  We are using Ultimaker brand PLA, printing at 220 degrees.  I have tried emailing Ultimaker for support, but have gotten nothing from them yet.  Has anyone had this issue and if so, how did you resolve it?