It looks like Yaesu have had some quality control issues with some FT991 transceivers, although I am unsure what percentage of units sold are effected. It does not look good though. It is always wise to wait a while so these initial issues are ironed out. In Yaesu’s defence, I have had an FT817 (original version with the old PA) for about 15 years and it still works as well as ever. I love it.