I previously built a report with build Telerik Reporting Q1 2015 (version 126.96.36.199). My report has several subreports stacked within a Panel. I did not have to dock or give the exact size of the subreports as the reports grow vertically depending on amount of data.
After upgrading to R3 2017 the second subreport within a Panel will overlap the first subreport. The other subreports will align correctly. I have tried everything to get the second subreport from overlapping the first.
I have included screenshots of report layout, the report rendered from Q1 2015 build and the same report rendered from the R3 2017 build.