OK a few things:
- you are going to have to accept the odd glitch when running your own install of multi-million dollar software (backed by a super helpful community) you got to use for (almost) free
- I’ve recently updated two sites that are fairly heavy users of tags and have had no issues.
- In my > 5 years of running multiple Discourse instances I think I’ve had a problem like this once?
Anyway, looks very similar issue to this, perhaps you can use a similar strategy to resolve?:
Looks like you were already on the right track here, you just have to follow it through …