It sounds like you're experiencing an issue with session persistence or authentication settings in your upgrade to Collaborator 14.5.14503. In older versions like 11.5, sessions might have been set to last longer, allowing users to stay logged in for extended periods.
To address this in version 14.5.14503, you'll want to check the session timeout settings. Look for options related to session duration or authentication token expiration in the Collaborator configuration. Adjusting these settings to align with your previous setup can help maintain longer user sessions, reducing the frequency of login prompts.
Remember to consider security implications when adjusting session durations, as longer sessions can pose a risk if not properly managed. Aim for a balance between user convenience and security best practices.