I have had my HP Pen (1MR94AA#UUF) for about 6 months and over the past couple of weeks, the nib/tip has been getting looser and looser and now repeatedly falls out.
I have tried to contact HP Support about the issue, however, this requires the serial number of the Pen, which I cannot locate anywhere on the Pen. The help from HP about finding serial numbers gives no guidance about doing so on HP Pens so I am not sure what to do next.
I have brought your issue to the attention of an appropriate team within HP. They will likely request information from you in order to look up your case details or product serial number. Please look for a private message from an identified HP contact. Additionally, keep in mind not to publicly post personal information (serial numbers and case details).
If you are unfamiliar with how the Forum's private message capability works, you can learn about that here.
I also have the same problem. I bought an HP Envy x360 bp-1xx series that includes an HP Pen (P/N: 905512-001), which is also around 6 months old, and the pen nib keeps falling out. I'm afraid that I may lose it. Can you also link me with the team that can help address my problem with my HP Pen nib?