@tekka007 I tried development version hex file 8MHz from https://github.com/mysensors/MySensorsBootloaderRF24/tree/development/hex it did not work as expected. I noticed firmware request is too slow from node. I guess recent chnages has some huge performance issue. I tested with MyController.org. I do not have windows environment to test with MYSController.
I using 8MHz file from https://forum.mysensors.org/topic/4991/mysbootloader-1-3pre2-testing Which is working awesome and quick response from node.