Have you intentionally exposed yourself to your previous triggers (assuming you had them)?

How long has it been since you had the zoster vaccine?

Were you of an on-label age for the zoster vaccine at receipt or was it off-label usage? Put another way did you receive Varivax or Zostavax dosing and were you in the on-label group (1-50 for Varivax and 50+ for Zostavax)?

The data isn't great but there's a fair bit of anecdata as you report and in your link that suggests there might be some protection against HSV from the VZV vaccines, possibly based on genetics or age of recipients.

Also your link was broken for me but the below might work.

https://proceedings.med.ucla.edu/index.php/2016/03/10/varice...