Farm with 9 WFEs - 6 on primary site, 3 in DR (stretched farm). BLOB cache is enabled on all WFEs.
Have some JS files in the Style Library sub-folder. Versioning with major versions enabled, no approval required. No publishing feature enabled (site or web).
The issue: all the servers in primary location return oldest (first) version of the JS files, while all WFEs in DR return the latest one. Therefore, changing the files doesn't cause BLOB cache invalidation on the primary site WFEs....
Other things already tried:
- added timestamps to JS file URLs
- disabled the Minimal download strategy
- tested in IE and Chrome + cleared browser cache
Any clues what is happening here?