Define the behavior of concern
A changing current-bar value and a signal disappearing from a closed historical bar are different observations. Identify the exact buffer, arrow, label or alert that matters and the point in time when you expect it to become fixed.
Keep a timed record
Use a demo or observation environment and save the input settings, symbol, timeframe and observations as new data arrives. Keep the original indicator unchanged for comparison. Record refreshes or restarts, because they may affect what is shown.
Agree what a fix should do
A proposed non-repainting variant may change when a signal becomes available. Discuss the trade-off and acceptance conditions before development. A historical screenshot alone cannot prove continuous signal behavior or future trading performance.
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