PowerApps Collection for Gallery All items is not working properly today

[Harpreet_Tohra]

Hi Everyone. 
I have made an app. In the app I have made a hidden gallery with dynamic data using complex calculations. The gallery might have 300 and more records. 
I was using ForAll function and putting the gallery data into collection and then sending the data to Power Automate flow to save it into an excel file.
My code is working fine from last 3 months. Suddenly from last night, It is showing incorrect data in my excel sheet.
What I found is, first collection  was changing date value that it got from the label to an integer/number. However I managed to solve that. Then It is giving error in collecting the data. Collection is not collecting the data properly. 
I am surprised the same thing was working well from last 3 months. Now, suddenly It is not even collecting the data correctly.
I don't know whether it is a Microsoft Bug or what has happened to it.
could anyone please help me over this. Thanks in advance