In member list, avatar image sizing is sensitive to the length of member name. Same applies to member detail. It can be seen on:
https://vysocina.pirati.cz/lide/
https://vysocina.pirati.cz/lide/arja-karimbasharyarova/
It can be fixed by setting max-width: 100px; to .c-profile-badge__image--smaller. Looks like setting width: 100px is not enough in this case.