Duplicate snippet loaders no longer replace initialized instance

1.410.2

Patch Changes

• #4334 bd93230 Thanks @posthog! - Conversations widget: treat a network-level message send failure (ad blocker, offline, CORS, page teardown) as transient — the widget now shows a "check your connection" message and logs at warn instead of error, so these benign failures no longer show up as captured exceptions in error tracking. (2026-08-03)

• #4341 d68e607 Thanks @posthog! - Prevent duplicate snippet loaders from replacing an initialized instance or replaying queued calls more than once, and warn with actionable guidance when init() is called again with a different project token (2026-08-03)