I checked in 2018R212 and markup is correct. So it is not an issue. May be at some point you had the page customized and that caused the issue? Best will be to create OOTB instance and check the page.

Yes, I concur with Nayan, I just verified in 20R1 and I do not see any issue in it.  

@nmansinha @vinayrajk 
Thank you, thank you very much for the verification from your side.
However, I have 3 little questions:

1， Why I am seeing a “?”, and you both are displaying a “-”？ are we looking at a same page?
What I am looking at is AR202800.aspx
 

2, I would agree that it in large chance this issue happaned only to me by mis customization.
But I am just wondering, every time a new upgrade would overwrite all files in /pages.
How shall this AR202800.aspx be restored to a incorrect version?

where is the incorrect infomation being kept, and how can I delete it?

3， did you get the package from the same place:

http://acumatica-builds.s3.amazonaws.com/

@nmansinha @vinayrajk 
Thank you, thank you very much for the verification from your side.
However, I have 3 little questions:

1， Why I am seeing a “?”, and you both are displaying a “-”？ are we looking at a same page?
What I am looking at is AR202800.aspx
 

2, I would agree that it in large chance this issue happaned only to me by mis customization.
But I am just wondering, every time a new upgrade would overwrite all files in /pages.
How shall this AR202800.aspx be restored to a incorrect version?

where is the incorrect infomation being kept, and how can I delete it?

3， did you get the package from the same place:

http://acumatica-builds.s3.amazonaws.com/

#1. Not sure why it is displaying “?” for you. I’m looked at a same page AR202800.aspx.

#2. Let us know how do you upgrade the versions? 
#3. Yes, got the package from same place. 

 

@vinayrajk 
Thank you very much for your time.
Just reply to #2，
1，installed a new version AcumaticaERP.msi
2,  unpblished the customizaion on the instance.
3， using the wizard to upgrade the old instance，both DB and site at the same time
---------------------------------------------------

Note： even after the 3rd steps, I found the AR202800.aspx is incorrect.

4, publish the customizaion.

note: after the customization be published, I checked the AR202800.aspx modified date, it is the same with other pages, not changed by the customization

5, Finally, since the AR202800.aspx is broken, I have to replace it with a correct one. Or I just simply open it in a text editor and modify the coding lines.

everytime, the 5 step is an extra step and unnessary step, I don’t know why.
please advise.

 

@Vinay K @nmansinha 
I am sorry, I did not figure things clearly. and posted a wrong question.
thank you.

Hello, to whom also interested in this question.

As I verified, the files in the C:\Program Files (x86)\Acumatica ERP\AcumaticaERP\Pages\AR\AR202800BKP

would overwrite the page file every upgrading.
if I rename the AR202800BKP folder, the files of new upgrade would not be overwrite anymore.