No? If you hold a 1.5% bond to maturity when the cash rate is 4.5% and projected to rise further you lose money in a very literal sense. Also they had to sell some at loss to just keep going before any gossip of trouble.
Should you look at the opportunity costs for lost potential gains in this scenario -- yeah. Does it "lose money" -- no, not unless you are forced to sell before maturity.
lost earnings are a wish for what could have been, not lost in reality.