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RefreshPortAsync().ConfigureAwait(false) moved the continuation off the UI thread. FetchDataAsync then tried to update UI controls from a background thread, causing a silent failure. The UI showed empty state and never recovered. Fix: remove ConfigureAwait(false) from UI-thread code path. Add diagnostic logging to trace the startup sequence. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Summary
HOTFIX — beta.18 shows empty UI and never recovers.
ConfigureAwait(false) on RefreshPortAsync moved the continuation off the UI thread. FetchDataAsync then silently failed trying to update UI controls from a background thread.
Fix: remove ConfigureAwait(false), add diagnostic logging.
Test plan
🤖 Generated with Claude Code