Well I tried to prepare you an example where it's possible to repeat that problem but without success. I tried with version 7.68 which was always working perfectly and now with new 8.41. Well clean example is working with both versions without problems. Something must be wrong in our application where problem occurs so it's not neccessary your bug.
I will try to find out what is wrong and in case if I find a bug in your controls I will let you know. However is it possible to have older versions in Client area available for download? Now it's only recent version available and sometimes it would be nice to have an access to older version.
Thanks!!