A group of Microsoft Products and technologies used for sharing and managing content, knowledge, and applications.
Hi Thank you for your quick response and we also appreciate that you spent your precious time doing these tests and provided the detailed information and screenshot to us.
Per you mentined that this problem was happened in different browsers and different lists, in order to narrow down if the problem was related to the local environment or your tenant account, please try to create a new user profile then sign in sahrepoint to check the result.
Besides, since our forum is focus on the problem which is related to SahrePoint online, so we're sorry to tell you that we have no enough environment to help you did a test. In order to make sure you can get the professional help, we suggest you can post your question in office-sharepoint-server-itpro - Microsoft Q&A , which is the specific channel that handles SharePoint on-premise related questions
and have more professional engineers who are proficient in this kind of problem.
Really appreciate your patience and understanding.
Best regards,
Stacey