Issue with previewing data in SSRS - sql-server

I have been having some issues previewing data in SSRS lately. I confirm that the datasources connections and datasets are fully correct. In my first example, when I preview the report, I cannot see the row containing the Total for each school. It does not display the label neither in the preview mode.
However, for the same report, when I preview it and try to export to Excel, bingo! the label and the total appears.
I thought it was maybe a bug on SSRS (within Visual Studio), so I downloaded Report Builder instead which was working fine till this morning.
Again, when I tried to preview the report, it is now returning me blank rows (although if I export to Excel, all the data is here). The same thing is happening in Report Builder, and I am stuck.
I wonder if anyone else has encountered similar issues, and if so, please let me know any workaround.
I am running Windows 10 Home Edition, and Visual Studio 2019, with the latest version of SSRS and Report Builder.

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SSRS RDL paginated reporting - Every time I edit an RDL report it removes the selected filters in report builder

SSRS RDL paginated reporting - Every time I edit an RDL report it removes the selected filters in report builder
It started a couple years ago periodically, when I would open to edit an existing rdl report the filters would remain but fields were blank. I logged a ticket with my saas vendor who came back with it being a known issue with MS but I wasn't able to find any reference online.
Some reports are from years ago, and having hundreds I need to review the MDX in the query before editing to remember what the default or filter values were...
Anyone else experiencing this?
I tried editing an rdl file in report builder and was expecting the filter selections to remain and not be blown out.

One Report viewer, many reports

I am converting a application where we used a local server with SSRS for reports. Corporate has now decided that instead we will use a corporate server and Tableau and ditch SSRS. I now have 20 reports that only need to be produced locally. I have decided to produced them as RDLC reports and display\print them with Report viewer. At this point the only way I know to do this is with 20 RDLC's and 20 Report viewers Forms. I am wondering if it is possible to have one "Report viewer form" that I can pass the RDLC I want to show. It just seems like a cleaner solution.

SSRS executing old sql

I have an SSRS report that I have updated the sql for one of the datasets. I have ran clean on the project and then rebuild. I deleted the original report from the server. I deployed the new report and then ran it. When I use SQL Profiler I can see that it executes the original SQL for the dataset. When I open the .rdl file in a text editor the SQL for the dataset has been saved correctly. What can be going wrong?
Solved the issue. It was an 'I'm a beepin muppet' problem ;-) There were two very similar reports and I was changing the wrong one! Lesson to learn is remember to dig through the code to determine exactly which report is being invoked via your application before trying to update it!

SSRS 2005 to 2012 migration - microcharts

We have some reports created in SSRS 2005, which uses Bonavista Microcharts plugin to show microcharts.
We would like to upgrade the reports to SSRS 2012 now, but I couldnot add the XLCubed dll to SSRS report toolbox(which worked perfect in SSRS 2008). It is throwing an error saying "There are no components in this dll that can be placed on toolbox".
I can't even go back to Sparkline in SSRS 2012, because that would require a complete restructure of Dataset. The dataset is designed for Bonavista plugin, the microchart data is combined with a pipe (eg, 500|200|300 etc).
Any change in DS means we will have to make changes in around 300 reports, do we have any 3rd party microchart tool available for SSRS 2012, that is similar to XLCubed microcharts/Bonavista microcharts?
You should take a look at: Nevron Chart for SSRS
Full disclosure: I'm in no way affiliated with Nevron

SSRS 2012 Different results between data tab and preview tab

I'm using SSRS 2012 with VS 2012 as the editing environment, against an MS SQL Server database. I have a text query dataset that when I execute in the Query dialog for the dataset returns proper results. In the preview tab, it returns nothing. If I replace the query text with a static list, it returns fine in both Query and preview. With the real query, there are no errors returned from preview, just an empty result set. The report also operates properly when deployed to the server. This is repeatable with a very simple query, at first I thought it might be because the original query was fairly complicated.
The report was recently converted from 2005, and worked fine in that environment (SSRS 2005, using VS 2008 against the same database). This is the first report I'm digging into since the conversion, but a cursory look at other reports demonstrates similar symptoms, so I suspect that testing report changes is going to be very difficult until I can find out how to get around this.
This is NOT a caching issue, I have removed the .rdl.data several times with the same results.
Any ideas why preview is eating the data or what I can do to make it behave?

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