Floating menu: "On Appear" - set variable value fails

Describe the bug
the "Set variable" action fails in "On Appear". (check the screens below...)
After restart of BTT some variables types are numbers (where can that come from ?)

Screenshots
after reboot BTT,
after first opened menu:


second opened menu:

third opened menu


Device information:

  • BetterTouchTool version: 5.396