First check basics, browser dev tools to see if any API calls are slow/failing when the form loads. In prod, also compare with a fast instance to spot differences (data volume, scripts, plugins, etc.).

For slow form load, usually it’s either heavy backend queries or client-side scripts so isolate by testing with minimal data / disabling custom scripts if possible.

For the context menu not loading on right-click,  inspect console errors + check if any JS override/custom UI script is blocking the event. Also try reproducing in another browser or incognito to rule out cache/extensions.

If it’s consistent in prod only, treat it as performance + data issue first, then drill into logs/APM traces.