in the RTL CSS i added this code to fix some RTL bugs:

/* ====== RTL fix ====== */
.rtl div.flex_column.first { margin-left: 0; margin-right: 0; }
.rtl div.flex_column { float: right; }
.rtl div .av_one_fifth { margin-right: 6%; margin-left: 0; }
.rtl div .av_one_fourth { margin-right: 6%; margin-left: 0; }
.rtl div .av_one_third { margin-right: 6%; margin-left: 0; }
.rtl div .av_two_fifth { margin-right: 6%; margin-left: 0; }
.rtl div .av_one_half { margin-right: 6%; margin-left: 0; }
.rtl div .av_three_fifth { margin-right: 6%; margin-left: 0; }
.rtl div .av_two_third { margin-right: 6%; margin-left: 0; }
.rtl div .av_three_fourth { margin-right: 6%; margin-left: 0; }
.rtl div .av_four_fifth { margin-right: 6%; margin-left: 0; }
.rtl div .av_one_sixth { margin-right: 6%; margin-left: 0; }
.rtl div .av_one_seventh { margin-right: 6%; margin-left: 0; }
.rtl div .av_one_eighth { margin-right: 6%; margin-left: 0; }
.rtl div .av_one_nineth { margin-right: 6%; margin-left: 0; }
.rtl div .av_one_tenth { margin-right: 6%; margin-left: 0; }
works as magic :)
בהצלחה