Currently we face an issue that when lead is qualified and opportunity is selected no to be created some fields on the lead record are erased when account and contact is created. It does not happen when opportunity is selected to be created. It would be good to have a tool which logs the changes what functionality changes or actived at that moment.

As now its almost impossible on heavily customized systems to determine if fields are erased because of cloud flows, business rules, Microsoft bugs.

After some testing on different tenants and environments, I have found that on every sales enterprise app lead fields First Name, Last Name, Job Title, Mobile Phone, Email, Company Name, Main Phone, and Website is it a Microsoft bug?

Steps to repeat:

Gets wiped after qualified if:

a) opportunity is selected not to be created

b) page is not refreshed after saving the record

Steps to repeat:

Press New button on lead

enter topic, first name, last name, company name

Save the record

Press Button qualify 

Choose not to create opportunity record when popup appears

Currently: first name, last name, company name fields get wiped but account and contact creates normally.