It can indicate an intermediate level or another model-specific state. The symbol should be read from the manual rather than treated as a damaged display segment.
What the observation means
Some hobs offer half steps; others use dots for timers or selections. A copied setting from a different appliance may therefore mean something different.
A useful next step
Check the display guide and record the complete symbol when reporting a problem. If segments are genuinely missing or flickering, do not guess the active heat level. Stop relying on an unreadable display until suitable advice establishes safe operation.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.