I need to ask few more questions before answering your query. Early consultations can prevent complications. Kindly contact me on whatsapp chat  (84960595 six five) Dr Faisal Zoheb MBBS , MD PAEDIATRICS , PGPN (BOSTON), FELLOWSHIP IN NEONATOLOGY ( Newborn and vaccination specialist )

Consult with Pediatrician physically for further evaluation and treatment

Greetings 13-month-old female infant who displays good eye contact, clear communication skills, and responsive interaction, but has recently started randomly covering her ears.Isolated ear covering in a toddler can resemble typical sensory exploration of how the world sounds, a standard emotional defense mechanism against overstimulation, or an early physiological reaction to a quiet environmental frequency.To rule out any physical or developmental underlying causes, it is best to check for three separate possibilities, such as a mild ear infection, fluid accumulation in the eustachian tubes, or a temporary stage of heightened auditory processing.If addressing potential discomfort or sensory aversion, you can explore three distinct management paths: creating a designated quiet space, tracking potential environmental triggers like background appliances, or utilizing gentle distraction through tactile play

can be some ear infection or just a development phase which is normal

Dont worry its normal behaviour

It is acceptable at the this age , Look for ear wax