Curious of incidence of this. Have you seen any/many? If so, what approach do you take?
Making a helix only skeletal mould, usually in semi-soft lucite/acrylic takes the ‘load’ off the canal in extreme cases.
Otherwise repeated use off a different soft dome may help. Starkey used to make some propellor shaped ones.
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Been through the same issue. Have had ear molds on my prior and current HA. they are great. No sense of feeling any discomfort. A plus is that the sound is drastically better that a plug. A relatively small investment with a great return.