Hello,
Unfortunately, flash support for the game has stopped, since all support for Flash has stopped. New miniclient versions were introduced to help address and alleviate the problem, and we can only recommend you use the miniclient. Unfortunately, flash related issues aren't always fixable by us since those systems are deprecated. The workarounds that are used are not guaranteed to continue working into the future as additional updates come out to other platforms. Sorry about this. :(