Was 6.12.29 the first rom you flashed ?
Did you make a clean install (full reset) the first time you flashed a custom rom ?
Full reset is indeed a heavy solution, but this 10-15 minute solution might avoid hours of log analysis
Worth trying !
no thats not normal. I deleted everything also partitions when changing from chinarom to 6.12.29. but others don't and it works, so I think you have a hardware problem.